Implment a tty port structure and supporting logic

index 49c1a22..fb17b18 100644
@@ -2004,6 +2004,43 @@ ssize_t redirected_tty_write(struct file *file, const char __user *buf,
 	return tty_write(file, buf, count, ppos);
 }
 
+void tty_port_init(struct tty_port *port)
+{
+	memset(port, 0, sizeof(*port));
+	init_waitqueue_head(&port->open_wait);
+	init_waitqueue_head(&port->close_wait);
+	mutex_init(&port->mutex);
+}
+
+EXPORT_SYMBOL(tty_port_init);
+
+int tty_port_alloc_xmit_buf(struct tty_port *port)
+{
+	/* We may sleep in get_zeroed_page() */
+	mutex_lock(&port->mutex);
+	if (port->xmit_buf == NULL)
+		port->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
+	mutex_unlock(&port->mutex);
+	if (port->xmit_buf == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+EXPORT_SYMBOL(tty_port_alloc_xmit_buf);
+
+void tty_port_free_xmit_buf(struct tty_port *port)
+{
+	mutex_lock(&port->mutex);
+	if (port->xmit_buf != NULL) {
+		free_page((unsigned long)port->xmit_buf);
+		port->xmit_buf = NULL;
+	}
+	mutex_unlock(&port->mutex);
+}
+
+EXPORT_SYMBOL(tty_port_free_xmit_buf);
+
+
 static char ptychar[] = "pqrstuvwxyzabcde";
 
 /**

index 7f7121f..a5dc3e9 100644
@@ -166,6 +166,30 @@ struct tty_bufhead {
 
 struct device;
 struct signal_struct;
+
+/*
+ * Port level information. Each device keeps its own port level information
+ * so provide a common structure for those ports wanting to use common support
+ * routines.
+ *
+ * The tty port has a different lifetime to the tty so must be kept apart.
+ * In addition be careful as tty -> port mappings are valid for the life
+ * of the tty object but in many cases port -> tty mappings are valid only
+ * until a hangup so don't use the wrong path.
+ */
+ 
+struct tty_port
+{
+	struct tty_struct	*tty;		/* Back pointer */
+	int			blocked_open;	/* Waiting to open */
+	int			count;		/* Usage count */
+	wait_queue_head_t	open_wait;	/* Open waiters */
+	wait_queue_head_t	close_wait;	/* Close waiters */
+	unsigned long		flags;		/* TTY flags ASY_*/
+	struct mutex		mutex;		/* Locking */
+	unsigned char		*xmit_buf;	/* Optional buffer */
+};
+
 /*
  * Where all of the state associated with a tty is kept while the tty
  * is open.  Since the termios state should be kept even if the tty

@@ -241,6 +265,7 @@ struct tty_struct {
 	spinlock_t read_lock;
 	/* If the tty has a pending do_SAK, queue it here - akpm */
 	struct work_struct SAK_work;
+	struct tty_port *port;
 };
 
 /* tty magic number */

@@ -351,6 +376,10 @@ extern void tty_write_unlock(struct tty_struct *tty);
 extern int tty_write_lock(struct tty_struct *tty, int ndelay);
 #define tty_is_writelocked(tty)  (mutex_is_locked(&tty->atomic_write_lock))
 
+extern void tty_port_init(struct tty_port *port);
+extern int tty_port_alloc_xmit_buf(struct tty_port *port);
+extern void tty_port_free_xmit_buf(struct tty_port *port);
+
 
 
 /* n_tty.c */

index fb17b18..31ab8f0 100644
@@ -3402,35 +3402,31 @@ static int tty_tiocmget(struct tty_struct *tty, struct file *file, int __user *p
 static int tty_tiocmset(struct tty_struct *tty, struct file *file, unsigned int cmd,
 	     unsigned __user *p)
 {
-	int retval = -EINVAL;
-
-	if (tty->ops->tiocmset) {
-		unsigned int set, clear, val;
-
-		retval = get_user(val, p);
-		if (retval)
-			return retval;
-
-		set = clear = 0;
-		switch (cmd) {
-		case TIOCMBIS:
-			set = val;
-			break;
-		case TIOCMBIC:
-			clear = val;
-			break;
-		case TIOCMSET:
-			set = val;
-			clear = ~val;
-			break;
-		}
+	int retval;
+	unsigned int set, clear, val;
 
-		set &= TIOCM_DTR|TIOCM_RTS|TIOCM_OUT1|TIOCM_OUT2|TIOCM_LOOP;
-		clear &= TIOCM_DTR|TIOCM_RTS|TIOCM_OUT1|TIOCM_OUT2|TIOCM_LOOP;
+	if (tty->ops->tiocmset == NULL)
+		return -EINVAL;
 
-		retval = tty->ops->tiocmset(tty, file, set, clear);
+	retval = get_user(val, p);
+	if (retval)
+		return retval;
+	set = clear = 0;
+	switch (cmd) {
+	case TIOCMBIS:
+		set = val;
+		break;
+	case TIOCMBIC:
+		clear = val;
+		break;
+	case TIOCMSET:
+		set = val;
+		clear = ~val;
+		break;
 	}
-	return retval;
+	set &= TIOCM_DTR|TIOCM_RTS|TIOCM_OUT1|TIOCM_OUT2|TIOCM_LOOP;
+	clear &= TIOCM_DTR|TIOCM_RTS|TIOCM_OUT1|TIOCM_OUT2|TIOCM_LOOP;
+	return tty->ops->tiocmset(tty, file, set, clear);
 }
 
 /*

index 60a4df7..d26752b 100644
@@ -432,7 +432,7 @@ static void pc_close(struct tty_struct *tty, struct file *filp)
 			spin_unlock_irqrestore(&epca_lock, flags);
 			return;
 		}
-		if (ch->count-- > 1)  {
+		if (ch->port.count-- > 1)  {
 			/* Begin channel is open more than once */
 			/*
 			 * Return without doing anything. Someone might still

@@ -442,19 +442,19 @@ static void pc_close(struct tty_struct *tty, struct file *filp)
 			return;
 		}
 		/* Port open only once go ahead with shutdown & reset */
-		BUG_ON(ch->count < 0);
+		BUG_ON(ch->port.count < 0);
 
 		/*
 		 * Let the rest of the driver know the channel is being closed.
 		 * This becomes important if an open is attempted before close
 		 * is finished.
 		 */
-		ch->asyncflags |= ASYNC_CLOSING;
+		ch->port.flags |= ASYNC_CLOSING;
 		tty->closing = 1;
 
 		spin_unlock_irqrestore(&epca_lock, flags);
 
-		if (ch->asyncflags & ASYNC_INITIALIZED)  {
+		if (ch->port.flags & ASYNC_INITIALIZED)  {
 			/* Setup an event to indicate when the
 			   transmit buffer empties */
 			setup_empty_event(tty, ch);

@@ -469,17 +469,17 @@ static void pc_close(struct tty_struct *tty, struct file *filp)
 		spin_lock_irqsave(&epca_lock, flags);
 		tty->closing = 0;
 		ch->event = 0;
-		ch->tty = NULL;
+		ch->port.tty = NULL;
 		spin_unlock_irqrestore(&epca_lock, flags);
 
-		if (ch->blocked_open) {
+		if (ch->port.blocked_open) {
 			if (ch->close_delay)
 				msleep_interruptible(jiffies_to_msecs(ch->close_delay));
-			wake_up_interruptible(&ch->open_wait);
+			wake_up_interruptible(&ch->port.open_wait);
 		}
-		ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
+		ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
 					ASYNC_CLOSING);
-		wake_up_interruptible(&ch->close_wait);
+		wake_up_interruptible(&ch->port.close_wait);
 	}
 }
 

@@ -489,7 +489,7 @@ static void shutdown(struct channel *ch)
 	struct tty_struct *tty;
 	struct board_chan __iomem *bc;
 
-	if (!(ch->asyncflags & ASYNC_INITIALIZED))
+	if (!(ch->port.flags & ASYNC_INITIALIZED))
 		return;
 
 	spin_lock_irqsave(&epca_lock, flags);

@@ -504,7 +504,7 @@ static void shutdown(struct channel *ch)
 	 */
 	if (bc)
 		writeb(0, &bc->idata);
-	tty = ch->tty;
+	tty = ch->port.tty;
 
 	/* If we're a modem control device and HUPCL is on, drop RTS & DTR. */
 	if (tty->termios->c_cflag & HUPCL)  {

@@ -518,7 +518,7 @@ static void shutdown(struct channel *ch)
 	 * will have to reinitialized. Set a flag to indicate this.
 	 */
 	/* Prevent future Digi programmed interrupts from coming active */
-	ch->asyncflags &= ~ASYNC_INITIALIZED;
+	ch->port.flags &= ~ASYNC_INITIALIZED;
 	spin_unlock_irqrestore(&epca_lock, flags);
 }
 

@@ -538,12 +538,12 @@ static void pc_hangup(struct tty_struct *tty)
 		shutdown(ch);
 
 		spin_lock_irqsave(&epca_lock, flags);
-		ch->tty   = NULL;
+		ch->port.tty   = NULL;
 		ch->event = 0;
-		ch->count = 0;
-		ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
+		ch->port.count = 0;
+		ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
 		spin_unlock_irqrestore(&epca_lock, flags);
-		wake_up_interruptible(&ch->open_wait);
+		wake_up_interruptible(&ch->port.open_wait);
 	}
 }
 

@@ -795,7 +795,7 @@ static int block_til_ready(struct tty_struct *tty,
 	unsigned long flags;
 
 	if (tty_hung_up_p(filp)) {
-		if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+		if (ch->port.flags & ASYNC_HUP_NOTIFY)
 			retval = -EAGAIN;
 		else
 			retval = -ERESTARTSYS;

@@ -806,10 +806,10 @@ static int block_til_ready(struct tty_struct *tty,
 	 * If the device is in the middle of being closed, then block until
 	 * it's done, and then try again.
 	 */
-	if (ch->asyncflags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&ch->close_wait);
+	if (ch->port.flags & ASYNC_CLOSING) {
+		interruptible_sleep_on(&ch->port.close_wait);
 
-		if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+		if (ch->port.flags & ASYNC_HUP_NOTIFY)
 			return -EAGAIN;
 		else
 			return -ERESTARTSYS;

@@ -820,7 +820,7 @@ static int block_til_ready(struct tty_struct *tty,
 		 * If non-blocking mode is set, then make the check up front
 		 * and then exit.
 		 */
-		ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
+		ch->port.flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 	if (tty->termios->c_cflag & CLOCAL)

@@ -828,24 +828,24 @@ static int block_til_ready(struct tty_struct *tty,
 	/* Block waiting for the carrier detect and the line to become free */
 
 	retval = 0;
-	add_wait_queue(&ch->open_wait, &wait);
+	add_wait_queue(&ch->port.open_wait, &wait);
 
 	spin_lock_irqsave(&epca_lock, flags);
 	/* We dec count so that pc_close will know when to free things */
 	if (!tty_hung_up_p(filp))
-		ch->count--;
-	ch->blocked_open++;
+		ch->port.count--;
+	ch->port.blocked_open++;
 	while (1) {
 		set_current_state(TASK_INTERRUPTIBLE);
 		if (tty_hung_up_p(filp) ||
-				!(ch->asyncflags & ASYNC_INITIALIZED)) {
-			if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+				!(ch->port.flags & ASYNC_INITIALIZED)) {
+			if (ch->port.flags & ASYNC_HUP_NOTIFY)
 				retval = -EAGAIN;
 			else
 				retval = -ERESTARTSYS;
 			break;
 		}
-		if (!(ch->asyncflags & ASYNC_CLOSING) &&
+		if (!(ch->port.flags & ASYNC_CLOSING) &&
 			  (do_clocal || (ch->imodem & ch->dcd)))
 			break;
 		if (signal_pending(current)) {

@@ -864,17 +864,17 @@ static int block_til_ready(struct tty_struct *tty,
 	}
 
 	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&ch->open_wait, &wait);
+	remove_wait_queue(&ch->port.open_wait, &wait);
 	if (!tty_hung_up_p(filp))
-		ch->count++;
-	ch->blocked_open--;
+		ch->port.count++;
+	ch->port.blocked_open--;
 
 	spin_unlock_irqrestore(&epca_lock, flags);
 
 	if (retval)
 		return retval;
 
-	ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
+	ch->port.flags |= ASYNC_NORMAL_ACTIVE;
 	return 0;
 }
 

@@ -933,7 +933,7 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
 	 * necessary because we do not wish to flush and shutdown the channel
 	 * until the last app holding the channel open, closes it.
 	 */
-	ch->count++;
+	ch->port.count++;
 	/*
 	 * Set a kernel structures pointer to our local channel structure. This
 	 * way we can get to it when passed only a tty struct.

@@ -957,14 +957,14 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
 	writew(head, &bc->rout);
 
 	/* Set the channels associated tty structure */
-	ch->tty = tty;
+	ch->port.tty = tty;
 
 	/*
 	 * The below routine generally sets up parity, baud, flow control
 	 * issues, etc.... It effect both control flags and input flags.
 	 */
 	epcaparam(tty, ch);
-	ch->asyncflags |= ASYNC_INITIALIZED;
+	ch->port.flags |= ASYNC_INITIALIZED;
 	memoff(ch);
 	spin_unlock_irqrestore(&epca_lock, flags);
 

@@ -976,7 +976,7 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
 	 * waiting for the line...
 	 */
 	spin_lock_irqsave(&epca_lock, flags);
-	ch->tty = tty;
+	ch->port.tty = tty;
 	globalwinon(ch);
 	/* Enable Digi Data events */
 	writeb(1, &bc->idata);

@@ -1017,8 +1017,8 @@ static void __exit epca_module_exit(void)
 		}
 		ch = card_ptr[crd];
 		for (count = 0; count < bd->numports; count++, ch++) {
-			if (ch && ch->tty)
-				tty_hangup(ch->tty);
+			if (ch && ch->port.tty)
+				tty_hangup(ch->port.tty);
 		}
 	}
 	pci_unregister_driver(&epca_driver);

@@ -1427,7 +1427,7 @@ static void post_fep_init(unsigned int crd)
 		ch->boardnum   = crd;
 		ch->channelnum = i;
 		ch->magic      = EPCA_MAGIC;
-		ch->tty        = NULL;
+		ch->port.tty        = NULL;
 
 		if (shrinkmem) {
 			fepcmd(ch, SETBUFFER, 32, 0, 0, 0);

@@ -1510,10 +1510,10 @@ static void post_fep_init(unsigned int crd)
 		ch->fepstopca = 0;
 
 		ch->close_delay = 50;
-		ch->count = 0;
-		ch->blocked_open = 0;
-		init_waitqueue_head(&ch->open_wait);
-		init_waitqueue_head(&ch->close_wait);
+		ch->port.count = 0;
+		ch->port.blocked_open = 0;
+		init_waitqueue_head(&ch->port.open_wait);
+		init_waitqueue_head(&ch->port.close_wait);
 
 		spin_unlock_irqrestore(&epca_lock, flags);
 	}

@@ -1633,15 +1633,15 @@ static void doevent(int crd)
 		if (event & MODEMCHG_IND) {
 			/* A modem signal change has been indicated */
 			ch->imodem = mstat;
-			if (ch->asyncflags & ASYNC_CHECK_CD) {
+			if (ch->port.flags & ASYNC_CHECK_CD) {
 				/* We are now receiving dcd */
 				if (mstat & ch->dcd)
-					wake_up_interruptible(&ch->open_wait);
+					wake_up_interruptible(&ch->port.open_wait);
 				else	/* No dcd; hangup */
 					pc_sched_event(ch, EPCA_EVENT_HANGUP);
 			}
 		}
-		tty = ch->tty;
+		tty = ch->port.tty;
 		if (tty) {
 			if (event & BREAK_IND) {
 				/* A break has been indicated */

@@ -1880,9 +1880,9 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch)
 		 * that the driver will wait on carrier detect.
 		 */
 		if (ts->c_cflag & CLOCAL)
-			ch->asyncflags &= ~ASYNC_CHECK_CD;
+			ch->port.flags &= ~ASYNC_CHECK_CD;
 		else
-			ch->asyncflags |= ASYNC_CHECK_CD;
+			ch->port.flags |= ASYNC_CHECK_CD;
 		mval = ch->m_dtr | ch->m_rts;
 	} /* End CBAUD not detected */
 	iflag = termios2digi_i(ch, ts->c_iflag);

@@ -1972,7 +1972,7 @@ static void receive_data(struct channel *ch)
 	globalwinon(ch);
 	if (ch->statusflags & RXSTOPPED)
 		return;
-	tty = ch->tty;
+	tty = ch->port.tty;
 	if (tty)
 		ts = tty->termios;
 	bc = ch->brdchan;

@@ -2032,7 +2032,7 @@ static void receive_data(struct channel *ch)
 	globalwinon(ch);
 	writew(tail, &bc->rout);
 	/* Must be called with global data */
-	tty_schedule_flip(ch->tty);
+	tty_schedule_flip(ch->port.tty);
 }
 
 static int info_ioctl(struct tty_struct *tty, struct file *file,

@@ -2376,7 +2376,7 @@ static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 
 		if (!(old_termios->c_cflag & CLOCAL) &&
 			 (tty->termios->c_cflag & CLOCAL))
-			wake_up_interruptible(&ch->open_wait);
+			wake_up_interruptible(&ch->port.open_wait);
 
 	} /* End if channel valid */
 }

@@ -2386,13 +2386,13 @@ static void do_softint(struct work_struct *work)
 	struct channel *ch = container_of(work, struct channel, tqueue);
 	/* Called in response to a modem change event */
 	if (ch && ch->magic == EPCA_MAGIC) {
-		struct tty_struct *tty = ch->tty;
+		struct tty_struct *tty = ch->port.tty;
 
 		if (tty && tty->driver_data) {
 			if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) {
 				tty_hangup(tty);
-				wake_up_interruptible(&ch->open_wait);
-				ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
+				wake_up_interruptible(&ch->port.open_wait);
+				ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
 			}
 		}
 	}

index 3c77c02..d414bf2 100644
@@ -84,6 +84,7 @@ static char *board_desc[] =
 struct channel 
 {
 	long   magic;
+	struct tty_port port;
 	unsigned char boardnum;
 	unsigned char channelnum;
 	unsigned char omodem;         /* FEP output modem status     */

@@ -117,10 +118,7 @@ struct channel
 	unsigned short rxbufhead;
 	unsigned short rxbufsize;
 	int    close_delay;
-	int    count;
-	int    blocked_open;
 	unsigned long  event;
-	int    asyncflags;
 	uint   dev;
 	unsigned long  statusflags;
 	unsigned long  c_iflag;

@@ -132,9 +130,6 @@ struct channel
 	struct board_info           *board;
 	struct board_chan	    __iomem *brdchan;
 	struct digi_struct          digiext;
-	struct tty_struct           *tty;
-	wait_queue_head_t           open_wait;
-	wait_queue_head_t           close_wait;
 	struct work_struct          tqueue;
 	struct global_data 	    __iomem *mailbox;
 };

index 4f3cefa..20be56f 100644
@@ -198,17 +198,12 @@ struct	isi_board {
 
 struct	isi_port {
 	unsigned short		magic;
-	unsigned int		flags;
-	int			count;
-	int			blocked_open;
+	struct tty_port		port;
 	int			close_delay;
 	u16			channel;
 	u16			status;
 	u16			closing_wait;
 	struct isi_board	*card;
-	struct tty_struct 	*tty;
-	wait_queue_head_t	close_wait;
-	wait_queue_head_t	open_wait;
 	unsigned char		*xmit_buf;
 	int			xmit_head;
 	int			xmit_tail;

@@ -430,11 +425,11 @@ static void isicom_tx(unsigned long _data)
 
 	for (; count > 0; count--, port++) {
 		/* port not active or tx disabled to force flow control */
-		if (!(port->flags & ASYNC_INITIALIZED) ||
+		if (!(port->port.flags & ASYNC_INITIALIZED) ||
 				!(port->status & ISI_TXOK))
 			continue;
 
-		tty = port->tty;
+		tty = port->port.tty;
 
 		if (tty == NULL)
 			continue;

@@ -458,7 +453,7 @@ static void isicom_tx(unsigned long _data)
 			if (residue == YES) {
 				residue = NO;
 				if (cnt > 0) {
-					wrd |= (port->xmit_buf[port->xmit_tail]
+					wrd |= (port->port.xmit_buf[port->xmit_tail]
 									<< 8);
 					port->xmit_tail = (port->xmit_tail + 1)
 						& (SERIAL_XMIT_SIZE - 1);

@@ -474,14 +469,14 @@ static void isicom_tx(unsigned long _data)
 			if (cnt <= 0)
 				break;
 			word_count = cnt >> 1;
-			outsw(base, port->xmit_buf+port->xmit_tail, word_count);
+			outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
 			port->xmit_tail = (port->xmit_tail
 				+ (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
 			txcount -= (word_count << 1);
 			port->xmit_cnt -= (word_count << 1);
 			if (cnt & 0x0001) {
 				residue = YES;
-				wrd = port->xmit_buf[port->xmit_tail];
+				wrd = port->port.xmit_buf[port->xmit_tail];
 				port->xmit_tail = (port->xmit_tail + 1)
 					& (SERIAL_XMIT_SIZE - 1);
 				port->xmit_cnt--;

@@ -548,13 +543,13 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 		return IRQ_HANDLED;
 	}
 	port = card->ports + channel;
-	if (!(port->flags & ASYNC_INITIALIZED)) {
+	if (!(port->port.flags & ASYNC_INITIALIZED)) {
 		outw(0x0000, base+0x04); /* enable interrupts */
 		spin_unlock(&card->card_lock);
 		return IRQ_HANDLED;
 	}
 
-	tty = port->tty;
+	tty = port->port.tty;
 	if (tty == NULL) {
 		word_count = byte_count >> 1;
 		while (byte_count > 1) {

@@ -572,7 +567,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 		header = inw(base);
 		switch (header & 0xff) {
 		case 0:	/* Change in EIA signals */
-			if (port->flags & ASYNC_CHECK_CD) {
+			if (port->port.flags & ASYNC_CHECK_CD) {
 				if (port->status & ISI_DCD) {
 					if (!(header & ISI_DCD)) {
 					/* Carrier has been lost  */

@@ -585,7 +580,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 				/* Carrier has been detected */
 					pr_dbg("interrupt: DCD->high.\n");
 					port->status |= ISI_DCD;
-					wake_up_interruptible(&port->open_wait);
+					wake_up_interruptible(&port->port.open_wait);
 				}
 			} else {
 				if (header & ISI_DCD)

@@ -594,17 +589,17 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 					port->status &= ~ISI_DCD;
 			}
 
-			if (port->flags & ASYNC_CTS_FLOW) {
-				if (port->tty->hw_stopped) {
+			if (port->port.flags & ASYNC_CTS_FLOW) {
+				if (port->port.tty->hw_stopped) {
 					if (header & ISI_CTS) {
-						port->tty->hw_stopped = 0;
+						port->port.tty->hw_stopped = 0;
 						/* start tx ing */
 						port->status |= (ISI_TXOK
 							| ISI_CTS);
 						tty_wakeup(tty);
 					}
 				} else if (!(header & ISI_CTS)) {
-					port->tty->hw_stopped = 1;
+					port->port.tty->hw_stopped = 1;
 					/* stop tx ing */
 					port->status &= ~(ISI_TXOK | ISI_CTS);
 				}

@@ -629,7 +624,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
 
 		case 1:	/* Received Break !!! */
 			tty_insert_flip_char(tty, 0, TTY_BREAK);
-			if (port->flags & ASYNC_SAK)
+			if (port->port.flags & ASYNC_SAK)
 				do_SAK(tty);
 			tty_flip_buffer_push(tty);
 			break;

@@ -681,7 +676,7 @@ static void isicom_config_port(struct isi_port *port)
 		shift_count = card->shift_count;
 	unsigned char flow_ctrl;
 
-	tty = port->tty;
+	tty = port->port.tty;
 
 	if (tty == NULL)
 		return;

@@ -697,7 +692,7 @@ static void isicom_config_port(struct isi_port *port)
 
 		/* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 		if (baud < 1 || baud > 4)
-			port->tty->termios->c_cflag &= ~CBAUDEX;
+			port->port.tty->termios->c_cflag &= ~CBAUDEX;
 		else
 			baud += 15;
 	}

@@ -708,13 +703,13 @@ static void isicom_config_port(struct isi_port *port)
 		 *  the 'setserial' utility.
 		 */
 
-		if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+		if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 			baud++; /*  57.6 Kbps */
-		if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+		if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
 			baud += 2; /*  115  Kbps */
-		if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+		if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
 			baud += 3; /* 230 kbps*/
-		if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+		if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
 			baud += 4; /* 460 kbps*/
 	}
 	if (linuxb_to_isib[baud] == -1) {

@@ -754,15 +749,15 @@ static void isicom_config_port(struct isi_port *port)
 		InterruptTheCard(base);
 	}
 	if (C_CLOCAL(tty))
-		port->flags &= ~ASYNC_CHECK_CD;
+		port->port.flags &= ~ASYNC_CHECK_CD;
 	else
-		port->flags |= ASYNC_CHECK_CD;
+		port->port.flags |= ASYNC_CHECK_CD;
 
 	/* flow control settings ...*/
 	flow_ctrl = 0;
-	port->flags &= ~ASYNC_CTS_FLOW;
+	port->port.flags &= ~ASYNC_CTS_FLOW;
 	if (C_CRTSCTS(tty)) {
-		port->flags |= ASYNC_CTS_FLOW;
+		port->port.flags |= ASYNC_CTS_FLOW;
 		flow_ctrl |= ISICOM_CTSRTS;
 	}
 	if (I_IXON(tty))

@@ -809,23 +804,15 @@ static int isicom_setup_port(struct isi_port *port)
 	struct isi_board *card = port->card;
 	unsigned long flags;
 
-	if (port->flags & ASYNC_INITIALIZED)
+	if (port->port.flags & ASYNC_INITIALIZED)
 		return 0;
-	if (!port->xmit_buf) {
-		/* Relies on BKL */
-		unsigned long page  = get_zeroed_page(GFP_KERNEL);
-		if (page == 0)
-			return -ENOMEM;
-		if (port->xmit_buf)
-			free_page(page);
-		else
-			port->xmit_buf = (unsigned char *) page;
-	}
+	if (tty_port_alloc_xmit_buf(&port->port) < 0)
+		return -ENOMEM;
 
 	spin_lock_irqsave(&card->card_lock, flags);
-	if (port->tty)
-		clear_bit(TTY_IO_ERROR, &port->tty->flags);
-	if (port->count == 1)
+	if (port->port.tty)
+		clear_bit(TTY_IO_ERROR, &port->port.tty->flags);
+	if (port->port.count == 1)
 		card->count++;
 
 	port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;

@@ -839,7 +826,7 @@ static int isicom_setup_port(struct isi_port *port)
 	}
 
 	isicom_config_port(port);
-	port->flags |= ASYNC_INITIALIZED;
+	port->port.flags |= ASYNC_INITIALIZED;
 	spin_unlock_irqrestore(&card->card_lock, flags);
 
 	return 0;

@@ -855,10 +842,10 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 
 	/* block if port is in the process of being closed */
 
-	if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
+	if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
 		pr_dbg("block_til_ready: close in progress.\n");
-		interruptible_sleep_on(&port->close_wait);
-		if (port->flags & ASYNC_HUP_NOTIFY)
+		interruptible_sleep_on(&port->port.close_wait);
+		if (port->port.flags & ASYNC_HUP_NOTIFY)
 			return -EAGAIN;
 		else
 			return -ERESTARTSYS;

@@ -869,7 +856,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	if ((filp->f_flags & O_NONBLOCK) ||
 			(tty->flags & (1 << TTY_IO_ERROR))) {
 		pr_dbg("block_til_ready: non-block mode.\n");
-		port->flags |= ASYNC_NORMAL_ACTIVE;
+		port->port.flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 

@@ -879,26 +866,26 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	/* block waiting for DCD to be asserted, and while
 						callout dev is busy */
 	retval = 0;
-	add_wait_queue(&port->open_wait, &wait);
+	add_wait_queue(&port->port.open_wait, &wait);
 
 	spin_lock_irqsave(&card->card_lock, flags);
 	if (!tty_hung_up_p(filp))
-		port->count--;
-	port->blocked_open++;
+		port->port.count--;
+	port->port.blocked_open++;
 	spin_unlock_irqrestore(&card->card_lock, flags);
 
 	while (1) {
 		raise_dtr_rts(port);
 
 		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
-			if (port->flags & ASYNC_HUP_NOTIFY)
+		if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
+			if (port->port.flags & ASYNC_HUP_NOTIFY)
 				retval = -EAGAIN;
 			else
 				retval = -ERESTARTSYS;
 			break;
 		}
-		if (!(port->flags & ASYNC_CLOSING) &&
+		if (!(port->port.flags & ASYNC_CLOSING) &&
 				(do_clocal || (port->status & ISI_DCD))) {
 			break;
 		}

@@ -909,15 +896,15 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 		schedule();
 	}
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->open_wait, &wait);
+	remove_wait_queue(&port->port.open_wait, &wait);
 	spin_lock_irqsave(&card->card_lock, flags);
 	if (!tty_hung_up_p(filp))
-		port->count++;
-	port->blocked_open--;
+		port->port.count++;
+	port->port.blocked_open--;
 	spin_unlock_irqrestore(&card->card_lock, flags);
 	if (retval)
 		return retval;
-	port->flags |= ASYNC_NORMAL_ACTIVE;
+	port->port.flags |= ASYNC_NORMAL_ACTIVE;
 	return 0;
 }
 

@@ -947,9 +934,9 @@ static int isicom_open(struct tty_struct *tty, struct file *filp)
 
 	isicom_setup_board(card);
 
-	port->count++;
+	port->port.count++;
 	tty->driver_data = port;
-	port->tty = tty;
+	port->port.tty = tty;
 	error = isicom_setup_port(port);
 	if (error == 0)
 		error = block_til_ready(tty, filp, port);

@@ -970,18 +957,15 @@ static void isicom_shutdown_port(struct isi_port *port)
 	struct isi_board *card = port->card;
 	struct tty_struct *tty;
 
-	tty = port->tty;
+	tty = port->port.tty;
 
-	if (!(port->flags & ASYNC_INITIALIZED))
+	if (!(port->port.flags & ASYNC_INITIALIZED))
 		return;
 
-	if (port->xmit_buf) {
-		free_page((unsigned long) port->xmit_buf);
-		port->xmit_buf = NULL;
-	}
-	port->flags &= ~ASYNC_INITIALIZED;
+	tty_port_free_xmit_buf(&port->port);
+	port->port.flags &= ~ASYNC_INITIALIZED;
 	/* 3rd October 2000 : Vinayak P Risbud */
-	port->tty = NULL;
+	port->port.tty = NULL;
 
 	/*Fix done by Anil .S on 30-04-2001
 	remote login through isi port has dtr toggle problem

@@ -1046,24 +1030,24 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
 		return;
 	}
 
-	if (tty->count == 1 && port->count != 1) {
+	if (tty->count == 1 && port->port.count != 1) {
 		printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
 			"count tty->count = 1 port count = %d.\n",
-			card->base, port->count);
-		port->count = 1;
+			card->base, port->port.count);
+		port->port.count = 1;
 	}
-	if (--port->count < 0) {
+	if (--port->port.count < 0) {
 		printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
 			"count for channel%d = %d", card->base, port->channel,
-			port->count);
-		port->count = 0;
+			port->port.count);
+		port->port.count = 0;
 	}
 
-	if (port->count) {
+	if (port->port.count) {
 		spin_unlock_irqrestore(&card->card_lock, flags);
 		return;
 	}
-	port->flags |= ASYNC_CLOSING;
+	port->port.flags |= ASYNC_CLOSING;
 	tty->closing = 1;
 	spin_unlock_irqrestore(&card->card_lock, flags);
 

@@ -1072,7 +1056,7 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
 	/* indicate to the card that no more data can be received
 	   on this port */
 	spin_lock_irqsave(&card->card_lock, flags);
-	if (port->flags & ASYNC_INITIALIZED) {
+	if (port->port.flags & ASYNC_INITIALIZED) {
 		card->port_status &= ~(1 << port->channel);
 		outw(card->port_status, card->base + 0x02);
 	}

@@ -1085,7 +1069,7 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
 	spin_lock_irqsave(&card->card_lock, flags);
 	tty->closing = 0;
 
-	if (port->blocked_open) {
+	if (port->port.blocked_open) {
 		spin_unlock_irqrestore(&card->card_lock, flags);
 		if (port->close_delay) {
 			pr_dbg("scheduling until time out.\n");

@@ -1093,10 +1077,10 @@ static void isicom_close(struct tty_struct *tty, struct file *filp)
 				jiffies_to_msecs(port->close_delay));
 		}
 		spin_lock_irqsave(&card->card_lock, flags);
-		wake_up_interruptible(&port->open_wait);
+		wake_up_interruptible(&port->port.open_wait);
 	}
-	port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
-	wake_up_interruptible(&port->close_wait);
+	port->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	wake_up_interruptible(&port->port.close_wait);
 	spin_unlock_irqrestore(&card->card_lock, flags);
 }
 

@@ -1112,9 +1096,6 @@ static int isicom_write(struct tty_struct *tty,	const unsigned char *buf,
 	if (isicom_paranoia_check(port, tty->name, "isicom_write"))
 		return 0;
 
-	if (!port->xmit_buf)
-		return 0;
-
 	spin_lock_irqsave(&card->card_lock, flags);
 
 	while (1) {

@@ -1123,7 +1104,7 @@ static int isicom_write(struct tty_struct *tty,	const unsigned char *buf,
 		if (cnt <= 0)
 			break;
 
-		memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
+		memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
 		port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
 			- 1);
 		port->xmit_cnt += cnt;

@@ -1147,16 +1128,13 @@ static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
 	if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
 		return 0;
 
-	if (!port->xmit_buf)
-		return 0;
-
 	spin_lock_irqsave(&card->card_lock, flags);
 	if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
 		spin_unlock_irqrestore(&card->card_lock, flags);
 		return 0;
 	}
 
-	port->xmit_buf[port->xmit_head++] = ch;
+	port->port.xmit_buf[port->xmit_head++] = ch;
 	port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
 	port->xmit_cnt++;
 	spin_unlock_irqrestore(&card->card_lock, flags);

@@ -1172,7 +1150,7 @@ static void isicom_flush_chars(struct tty_struct *tty)
 		return;
 
 	if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
-			!port->xmit_buf)
+			!port->port.xmit_buf)
 		return;
 
 	/* this tells the transmitter to consider this port for

@@ -1274,23 +1252,23 @@ static int isicom_set_serial_info(struct isi_port *port,
 
 	lock_kernel();
 
-	reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
+	reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
 		(newinfo.flags & ASYNC_SPD_MASK));
 
 	if (!capable(CAP_SYS_ADMIN)) {
 		if ((newinfo.close_delay != port->close_delay) ||
 				(newinfo.closing_wait != port->closing_wait) ||
 				((newinfo.flags & ~ASYNC_USR_MASK) !=
-				(port->flags & ~ASYNC_USR_MASK))) {
+				(port->port.flags & ~ASYNC_USR_MASK))) {
 			unlock_kernel();
 			return -EPERM;
 		}
-		port->flags = ((port->flags & ~ASYNC_USR_MASK) |
+		port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
 				(newinfo.flags & ASYNC_USR_MASK));
 	} else {
 		port->close_delay = newinfo.close_delay;
 		port->closing_wait = newinfo.closing_wait;
-		port->flags = ((port->flags & ~ASYNC_FLAGS) |
+		port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
 				(newinfo.flags & ASYNC_FLAGS));
 	}
 	if (reconfig_port) {

@@ -1314,7 +1292,7 @@ static int isicom_get_serial_info(struct isi_port *port,
 	out_info.line = port - isi_ports;
 	out_info.port = port->card->base;
 	out_info.irq = port->card->irq;
-	out_info.flags = port->flags;
+	out_info.flags = port->port.flags;
 /*	out_info.baud_base = ? */
 	out_info.close_delay = port->close_delay;
 	out_info.closing_wait = port->closing_wait;

@@ -1454,10 +1432,10 @@ static void isicom_hangup(struct tty_struct *tty)
 	isicom_shutdown_port(port);
 	spin_unlock_irqrestore(&port->card->card_lock, flags);
 
-	port->count = 0;
-	port->flags &= ~ASYNC_NORMAL_ACTIVE;
-	port->tty = NULL;
-	wake_up_interruptible(&port->open_wait);
+	port->port.count = 0;
+	port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+	port->port.tty = NULL;
+	wake_up_interruptible(&port->port.open_wait);
 }
 
 

@@ -1824,8 +1802,7 @@ static int __init isicom_init(void)
 			port->close_delay = 50 * HZ/100;
 			port->closing_wait = 3000 * HZ/100;
 			port->status = 0;
-			init_waitqueue_head(&port->open_wait);
-			init_waitqueue_head(&port->close_wait);
+			tty_port_init(&port->port);
 			/*  . . .  */
 		}
 		isi_card[idx].base = 0;

index d57d3a6..bb9bcff 100644
@@ -130,17 +130,14 @@ struct moxaq_str {
 };
 
 struct moxa_port {
+	struct tty_port port;
 	struct moxa_board_conf *board;
-	struct tty_struct *tty;
 	void __iomem *tableAddr;
 
 	int type;
 	int close_delay;
-	unsigned int count;
-	int asyncflags;
 	int cflag;
 	unsigned long statusflags;
-	wait_queue_head_t open_wait;
 
 	u8 DCDState;
 	u8 lineCtrl;

@@ -348,10 +345,10 @@ static int moxa_ioctl(struct tty_struct *tty, struct file *file,
 				if (status & 4)
 					tmp.dcd = 1;
 
-				if (!p->tty || !p->tty->termios)
+				if (!p->port.tty || !p->port.tty->termios)
 					tmp.cflag = p->cflag;
 				else
-					tmp.cflag = p->tty->termios->c_cflag;
+					tmp.cflag = p->port.tty->termios->c_cflag;
 copy:
 				if (copy_to_user(argm, &tmp, sizeof(tmp))) {
 					mutex_unlock(&moxa_openlock);

@@ -828,7 +825,7 @@ static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
 		p->type = PORT_16550A;
 		p->close_delay = 5 * HZ / 10;
 		p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
-		init_waitqueue_head(&p->open_wait);
+		tty_port_init(&p->port);
 	}
 
 	switch (brd->boardType) {

@@ -884,12 +881,12 @@ static void moxa_board_deinit(struct moxa_board_conf *brd)
 
 	/* pci hot-un-plug support */
 	for (a = 0; a < brd->numPorts; a++)
-		if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
-			tty_hangup(brd->ports[a].tty);
+		if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
+			tty_hangup(brd->ports[a].port.tty);
 	while (1) {
 		opened = 0;
 		for (a = 0; a < brd->numPorts; a++)
-			if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
+			if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
 				opened++;
 		mutex_unlock(&moxa_openlock);
 		if (!opened)

@@ -1104,9 +1101,9 @@ static void moxa_close_port(struct moxa_port *ch)
 {
 	moxa_shut_down(ch);
 	MoxaPortFlushData(ch, 2);
-	ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
-	ch->tty->driver_data = NULL;
-	ch->tty = NULL;
+	ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+	ch->port.tty->driver_data = NULL;
+	ch->port.tty = NULL;
 }
 
 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,

@@ -1117,7 +1114,7 @@ static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
 	u8 dcd;
 
 	while (1) {
-		prepare_to_wait(&ch->open_wait, &wait, TASK_INTERRUPTIBLE);
+		prepare_to_wait(&ch->port.open_wait, &wait, TASK_INTERRUPTIBLE);
 		if (tty_hung_up_p(filp)) {
 #ifdef SERIAL_DO_RESTART
 			retval = -ERESTARTSYS;

@@ -1138,7 +1135,7 @@ static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
 		}
 		schedule();
 	}
-	finish_wait(&ch->open_wait, &wait);
+	finish_wait(&ch->port.open_wait, &wait);
 
 	return retval;
 }

@@ -1163,16 +1160,16 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
 	}
 
 	ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
-	ch->count++;
+	ch->port.count++;
 	tty->driver_data = ch;
-	ch->tty = tty;
-	if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
+	ch->port.tty = tty;
+	if (!(ch->port.flags & ASYNC_INITIALIZED)) {
 		ch->statusflags = 0;
 		moxa_set_tty_param(tty, tty->termios);
 		MoxaPortLineCtrl(ch, 1, 1);
 		MoxaPortEnable(ch);
 		MoxaSetFifo(ch, ch->type == PORT_16550A);
-		ch->asyncflags |= ASYNC_INITIALIZED;
+		ch->port.flags |= ASYNC_INITIALIZED;
 	}
 	mutex_unlock(&moxa_openlock);
 

@@ -1181,11 +1178,11 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
 		retval = moxa_block_till_ready(tty, filp, ch);
 	mutex_lock(&moxa_openlock);
 	if (retval) {
-		if (ch->count) /* 0 means already hung up... */
-			if (--ch->count == 0)
+		if (ch->port.count) /* 0 means already hung up... */
+			if (--ch->port.count == 0)
 				moxa_close_port(ch);
 	} else
-		ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
+		ch->port.flags |= ASYNC_NORMAL_ACTIVE;
 	mutex_unlock(&moxa_openlock);
 
 	return retval;

@@ -1204,21 +1201,21 @@ static void moxa_close(struct tty_struct *tty, struct file *filp)
 	ch = tty->driver_data;
 	if (ch == NULL)
 		goto unlock;
-	if (tty->count == 1 && ch->count != 1) {
+	if (tty->count == 1 && ch->port.count != 1) {
 		printk(KERN_WARNING "moxa_close: bad serial port count; "
-			"tty->count is 1, ch->count is %d\n", ch->count);
-		ch->count = 1;
+			"tty->count is 1, ch->port.count is %d\n", ch->port.count);
+		ch->port.count = 1;
 	}
-	if (--ch->count < 0) {
+	if (--ch->port.count < 0) {
 		printk(KERN_WARNING "moxa_close: bad serial port count, "
 			"device=%s\n", tty->name);
-		ch->count = 0;
+		ch->port.count = 0;
 	}
-	if (ch->count)
+	if (ch->port.count)
 		goto unlock;
 
 	ch->cflag = tty->termios->c_cflag;
-	if (ch->asyncflags & ASYNC_INITIALIZED) {
+	if (ch->port.flags & ASYNC_INITIALIZED) {
 		moxa_setup_empty_event(tty);
 		tty_wait_until_sent(tty, 30 * HZ);	/* 30 seconds timeout */
 	}

@@ -1374,7 +1371,7 @@ static void moxa_set_termios(struct tty_struct *tty,
 		return;
 	moxa_set_tty_param(tty, old_termios);
 	if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
-		wake_up_interruptible(&ch->open_wait);
+		wake_up_interruptible(&ch->port.open_wait);
 }
 
 static void moxa_stop(struct tty_struct *tty)

@@ -1412,20 +1409,20 @@ static void moxa_hangup(struct tty_struct *tty)
 		mutex_unlock(&moxa_openlock);
 		return;
 	}
-	ch->count = 0;
+	ch->port.count = 0;
 	moxa_close_port(ch);
 	mutex_unlock(&moxa_openlock);
 
-	wake_up_interruptible(&ch->open_wait);
+	wake_up_interruptible(&ch->port.open_wait);
 }
 
 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
 {
 	dcd = !!dcd;
 
-	if (dcd != p->DCDState && p->tty && C_CLOCAL(p->tty)) {
+	if (dcd != p->DCDState && p->port.tty && C_CLOCAL(p->port.tty)) {
 		if (!dcd)
-			tty_hangup(p->tty);
+			tty_hangup(p->port.tty);
 	}
 	p->DCDState = dcd;
 }

@@ -1433,9 +1430,9 @@ static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
 		u16 __iomem *ip)
 {
-	struct tty_struct *tty = p->tty;
+	struct tty_struct *tty = p->port.tty;
 	void __iomem *ofsAddr;
-	unsigned int inited = p->asyncflags & ASYNC_INITIALIZED;
+	unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
 	u16 intr;
 
 	if (tty) {

@@ -1566,9 +1563,9 @@ static void moxa_setup_empty_event(struct tty_struct *tty)
 
 static void moxa_shut_down(struct moxa_port *ch)
 {
-	struct tty_struct *tp = ch->tty;
+	struct tty_struct *tp = ch->port.tty;
 
-	if (!(ch->asyncflags & ASYNC_INITIALIZED))
+	if (!(ch->port.flags & ASYNC_INITIALIZED))
 		return;
 
 	MoxaPortDisable(ch);

@@ -1580,7 +1577,7 @@ static void moxa_shut_down(struct moxa_port *ch)
 		MoxaPortLineCtrl(ch, 0, 0);
 
 	spin_lock_bh(&moxa_lock);
-	ch->asyncflags &= ~ASYNC_INITIALIZED;
+	ch->port.flags &= ~ASYNC_INITIALIZED;
 	spin_unlock_bh(&moxa_lock);
 }
 

@@ -1975,7 +1972,7 @@ static int MoxaPortWriteData(struct moxa_port *port,
 	c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
 	if (c > len)
 		c = len;
-	moxaLog.txcnt[port->tty->index] += c;
+	moxaLog.txcnt[port->port.tty->index] += c;
 	total = c;
 	if (spage == epage) {
 		bufhead = readw(ofsAddr + Ofs_txb);

@@ -2017,7 +2014,7 @@ static int MoxaPortWriteData(struct moxa_port *port,
 
 static int MoxaPortReadData(struct moxa_port *port)
 {
-	struct tty_struct *tty = port->tty;
+	struct tty_struct *tty = port->port.tty;
 	unsigned char *dst;
 	void __iomem *baseAddr, *ofsAddr, *ofs;
 	unsigned int count, len, total;

@@ -2124,8 +2121,8 @@ static int moxa_get_serial_info(struct moxa_port *info,
 {
 	struct serial_struct tmp = {
 		.type = info->type,
-		.line = info->tty->index,
-		.flags = info->asyncflags,
+		.line = info->port.tty->index,
+		.flags = info->port.flags,
 		.baud_base = 921600,
 		.close_delay = info->close_delay
 	};

@@ -2148,13 +2145,13 @@ static int moxa_set_serial_info(struct moxa_port *info,
 
 	if (!capable(CAP_SYS_ADMIN)) {
 		if (((new_serial.flags & ~ASYNC_USR_MASK) !=
-		     (info->asyncflags & ~ASYNC_USR_MASK)))
+		     (info->port.flags & ~ASYNC_USR_MASK)))
 			return -EPERM;
 	} else
 		info->close_delay = new_serial.close_delay * HZ / 100;
 
 	new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
-	new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
+	new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
 
 	MoxaSetFifo(info, new_serial.type == PORT_16550A);
 

index 4b81a85..e83ccee 100644
@@ -222,8 +222,8 @@ struct mxser_mon_ext {
 struct mxser_board;
 
 struct mxser_port {
+	struct tty_port port;
 	struct mxser_board *board;
-	struct tty_struct *tty;
 
 	unsigned long ioaddr;
 	unsigned long opmode_ioaddr;

@@ -234,7 +234,6 @@ struct mxser_port {
 	int rx_low_water;
 	int baud_base;		/* max. speed */
 	int type;		/* UART type */
-	int flags;		/* defined in tty.h */
 
 	int x_char;		/* xon/xoff character */
 	int IER;		/* Interrupt Enable Register */

@@ -249,15 +248,12 @@ struct mxser_port {
 	unsigned char err_shadow;
 	unsigned long event;
 
-	int count;		/* # of fd on device */
-	int blocked_open;	/* # of blocked opens */
 	struct async_icount icount; /* kernel counters for 4 input interrupts */
 	int timeout;
 
 	int read_status_mask;
 	int ignore_status_mask;
 	int xmit_fifo_size;
-	unsigned char *xmit_buf;
 	int xmit_head;
 	int xmit_tail;
 	int xmit_cnt;

@@ -267,7 +263,6 @@ struct mxser_port {
 	struct mxser_mon mon_data;
 
 	spinlock_t slock;
-	wait_queue_head_t open_wait;
 	wait_queue_head_t delta_msr_wait;
 };
 

@@ -575,7 +570,7 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 	 */
 	if ((filp->f_flags & O_NONBLOCK) ||
 			test_bit(TTY_IO_ERROR, &tty->flags)) {
-		port->flags |= ASYNC_NORMAL_ACTIVE;
+		port->port.flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 

@@ -585,32 +580,32 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 	/*
 	 * Block waiting for the carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, port->count is dropped by one, so that
+	 * this loop, port->port.count is dropped by one, so that
 	 * mxser_close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 	retval = 0;
-	add_wait_queue(&port->open_wait, &wait);
+	add_wait_queue(&port->port.open_wait, &wait);
 
 	spin_lock_irqsave(&port->slock, flags);
 	if (!tty_hung_up_p(filp))
-		port->count--;
+		port->port.count--;
 	spin_unlock_irqrestore(&port->slock, flags);
-	port->blocked_open++;
+	port->port.blocked_open++;
 	while (1) {
 		spin_lock_irqsave(&port->slock, flags);
 		outb(inb(port->ioaddr + UART_MCR) |
 			UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
 		spin_unlock_irqrestore(&port->slock, flags);
 		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
-			if (port->flags & ASYNC_HUP_NOTIFY)
+		if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
+			if (port->port.flags & ASYNC_HUP_NOTIFY)
 				retval = -EAGAIN;
 			else
 				retval = -ERESTARTSYS;
 			break;
 		}
-		if (!(port->flags & ASYNC_CLOSING) &&
+		if (!(port->port.flags & ASYNC_CLOSING) &&
 				(do_clocal ||
 				(inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
 			break;

@@ -621,13 +616,13 @@ static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
 		schedule();
 	}
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->open_wait, &wait);
+	remove_wait_queue(&port->port.open_wait, &wait);
 	if (!tty_hung_up_p(filp))
-		port->count++;
-	port->blocked_open--;
+		port->port.count++;
+	port->port.blocked_open--;
 	if (retval)
 		return retval;
-	port->flags |= ASYNC_NORMAL_ACTIVE;
+	port->port.flags |= ASYNC_NORMAL_ACTIVE;
 	return 0;
 }
 

@@ -636,7 +631,7 @@ static int mxser_set_baud(struct mxser_port *info, long newspd)
 	int quot = 0, baud;
 	unsigned char cval;
 
-	if (!info->tty || !info->tty->termios)
+	if (!info->port.tty || !info->port.tty->termios)
 		return -1;
 
 	if (!(info->ioaddr))

@@ -647,13 +642,13 @@ static int mxser_set_baud(struct mxser_port *info, long newspd)
 
 	if (newspd == 134) {
 		quot = 2 * info->baud_base / 269;
-		tty_encode_baud_rate(info->tty, 134, 134);
+		tty_encode_baud_rate(info->port.tty, 134, 134);
 	} else if (newspd) {
 		quot = info->baud_base / newspd;
 		if (quot == 0)
 			quot = 1;
 		baud = info->baud_base/quot;
-		tty_encode_baud_rate(info->tty, baud, baud);
+		tty_encode_baud_rate(info->port.tty, baud, baud);
 	} else {
 		quot = 0;
 	}

@@ -679,7 +674,7 @@ static int mxser_set_baud(struct mxser_port *info, long newspd)
 	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */
 
 #ifdef BOTHER
-	if (C_BAUD(info->tty) == BOTHER) {
+	if (C_BAUD(info->port.tty) == BOTHER) {
 		quot = info->baud_base % newspd;
 		quot *= 8;
 		if (quot % newspd > newspd / 2) {

@@ -707,14 +702,14 @@ static int mxser_change_speed(struct mxser_port *info,
 	int ret = 0;
 	unsigned char status;
 
-	if (!info->tty || !info->tty->termios)
+	if (!info->port.tty || !info->port.tty->termios)
 		return ret;
-	cflag = info->tty->termios->c_cflag;
+	cflag = info->port.tty->termios->c_cflag;
 	if (!(info->ioaddr))
 		return ret;
 
-	if (mxser_set_baud_method[info->tty->index] == 0)
-		mxser_set_baud(info, tty_get_baud_rate(info->tty));
+	if (mxser_set_baud_method[info->port.tty->index] == 0)
+		mxser_set_baud(info, tty_get_baud_rate(info->port.tty));
 
 	/* byte size and parity */
 	switch (cflag & CSIZE) {

@@ -777,15 +772,15 @@ static int mxser_change_speed(struct mxser_port *info,
 	info->IER &= ~UART_IER_MSI;
 	info->MCR &= ~UART_MCR_AFE;
 	if (cflag & CRTSCTS) {
-		info->flags |= ASYNC_CTS_FLOW;
+		info->port.flags |= ASYNC_CTS_FLOW;
 		info->IER |= UART_IER_MSI;
 		if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
 			info->MCR |= UART_MCR_AFE;
 		} else {
 			status = inb(info->ioaddr + UART_MSR);
-			if (info->tty->hw_stopped) {
+			if (info->port.tty->hw_stopped) {
 				if (status & UART_MSR_CTS) {
-					info->tty->hw_stopped = 0;
+					info->port.tty->hw_stopped = 0;
 					if (info->type != PORT_16550A &&
 							!info->board->chip_flag) {
 						outb(info->IER & ~UART_IER_THRI,

@@ -795,11 +790,11 @@ static int mxser_change_speed(struct mxser_port *info,
 						outb(info->IER, info->ioaddr +
 								UART_IER);
 					}
-					tty_wakeup(info->tty);
+					tty_wakeup(info->port.tty);
 				}
 			} else {
 				if (!(status & UART_MSR_CTS)) {
-					info->tty->hw_stopped = 1;
+					info->port.tty->hw_stopped = 1;
 					if ((info->type != PORT_16550A) &&
 							(!info->board->chip_flag)) {
 						info->IER &= ~UART_IER_THRI;

@@ -810,13 +805,13 @@ static int mxser_change_speed(struct mxser_port *info,
 			}
 		}
 	} else {
-		info->flags &= ~ASYNC_CTS_FLOW;
+		info->port.flags &= ~ASYNC_CTS_FLOW;
 	}
 	outb(info->MCR, info->ioaddr + UART_MCR);
 	if (cflag & CLOCAL) {
-		info->flags &= ~ASYNC_CHECK_CD;
+		info->port.flags &= ~ASYNC_CHECK_CD;
 	} else {
-		info->flags |= ASYNC_CHECK_CD;
+		info->port.flags |= ASYNC_CHECK_CD;
 		info->IER |= UART_IER_MSI;
 	}
 	outb(info->IER, info->ioaddr + UART_IER);

@@ -825,21 +820,21 @@ static int mxser_change_speed(struct mxser_port *info,
 	 * Set up parity check flag
 	 */
 	info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
-	if (I_INPCK(info->tty))
+	if (I_INPCK(info->port.tty))
 		info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
-	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
 		info->read_status_mask |= UART_LSR_BI;
 
 	info->ignore_status_mask = 0;
 
-	if (I_IGNBRK(info->tty)) {
+	if (I_IGNBRK(info->port.tty)) {
 		info->ignore_status_mask |= UART_LSR_BI;
 		info->read_status_mask |= UART_LSR_BI;
 		/*
 		 * If we're ignore parity and break indicators, ignore
 		 * overruns too.  (For real raw support).
 		 */
-		if (I_IGNPAR(info->tty)) {
+		if (I_IGNPAR(info->port.tty)) {
 			info->ignore_status_mask |=
 						UART_LSR_OE |
 						UART_LSR_PE |

@@ -851,16 +846,16 @@ static int mxser_change_speed(struct mxser_port *info,
 		}
 	}
 	if (info->board->chip_flag) {
-		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->tty));
-		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->tty));
-		if (I_IXON(info->tty)) {
+		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty));
+		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty));
+		if (I_IXON(info->port.tty)) {
 			mxser_enable_must_rx_software_flow_control(
 					info->ioaddr);
 		} else {
 			mxser_disable_must_rx_software_flow_control(
 					info->ioaddr);
 		}
-		if (I_IXOFF(info->tty)) {
+		if (I_IXOFF(info->port.tty)) {
 			mxser_enable_must_tx_software_flow_control(
 					info->ioaddr);
 		} else {

@@ -890,15 +885,15 @@ static void mxser_check_modem_status(struct mxser_port *port, int status)
 	port->mon_data.modem_status = status;
 	wake_up_interruptible(&port->delta_msr_wait);
 
-	if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
+	if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
 		if (status & UART_MSR_DCD)
-			wake_up_interruptible(&port->open_wait);
+			wake_up_interruptible(&port->port.open_wait);
 	}
 
-	if (port->flags & ASYNC_CTS_FLOW) {
-		if (port->tty->hw_stopped) {
+	if (port->port.flags & ASYNC_CTS_FLOW) {
+		if (port->port.tty->hw_stopped) {
 			if (status & UART_MSR_CTS) {
-				port->tty->hw_stopped = 0;
+				port->port.tty->hw_stopped = 0;
 
 				if ((port->type != PORT_16550A) &&
 						(!port->board->chip_flag)) {

@@ -908,11 +903,11 @@ static void mxser_check_modem_status(struct mxser_port *port, int status)
 					outb(port->IER, port->ioaddr +
 							UART_IER);
 				}
-				tty_wakeup(port->tty);
+				tty_wakeup(port->port.tty);
 			}
 		} else {
 			if (!(status & UART_MSR_CTS)) {
-				port->tty->hw_stopped = 1;
+				port->port.tty->hw_stopped = 1;
 				if (port->type != PORT_16550A &&
 						!port->board->chip_flag) {
 					port->IER &= ~UART_IER_THRI;

@@ -935,23 +930,23 @@ static int mxser_startup(struct mxser_port *info)
 
 	spin_lock_irqsave(&info->slock, flags);
 
-	if (info->flags & ASYNC_INITIALIZED) {
+	if (info->port.flags & ASYNC_INITIALIZED) {
 		free_page(page);
 		spin_unlock_irqrestore(&info->slock, flags);
 		return 0;
 	}
 
 	if (!info->ioaddr || !info->type) {
-		if (info->tty)
-			set_bit(TTY_IO_ERROR, &info->tty->flags);
+		if (info->port.tty)
+			set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 		free_page(page);
 		spin_unlock_irqrestore(&info->slock, flags);
 		return 0;
 	}
-	if (info->xmit_buf)
+	if (info->port.xmit_buf)
 		free_page(page);
 	else
-		info->xmit_buf = (unsigned char *) page;
+		info->port.xmit_buf = (unsigned char *) page;
 
 	/*
 	 * Clear the FIFO buffers and disable them

@@ -973,8 +968,8 @@ static int mxser_startup(struct mxser_port *info)
 	if (inb(info->ioaddr + UART_LSR) == 0xff) {
 		spin_unlock_irqrestore(&info->slock, flags);
 		if (capable(CAP_SYS_ADMIN)) {
-			if (info->tty)
-				set_bit(TTY_IO_ERROR, &info->tty->flags);
+			if (info->port.tty)
+				set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 			return 0;
 		} else
 			return -ENODEV;

@@ -1012,15 +1007,15 @@ static int mxser_startup(struct mxser_port *info)
 	(void) inb(info->ioaddr + UART_IIR);
 	(void) inb(info->ioaddr + UART_MSR);
 
-	if (info->tty)
-		clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (info->port.tty)
+		clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
 	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 
 	/*
 	 * and set the speed of the serial port
 	 */
 	mxser_change_speed(info, NULL);
-	info->flags |= ASYNC_INITIALIZED;
+	info->port.flags |= ASYNC_INITIALIZED;
 	spin_unlock_irqrestore(&info->slock, flags);
 
 	return 0;

@@ -1034,7 +1029,7 @@ static void mxser_shutdown(struct mxser_port *info)
 {
 	unsigned long flags;
 
-	if (!(info->flags & ASYNC_INITIALIZED))
+	if (!(info->port.flags & ASYNC_INITIALIZED))
 		return;
 
 	spin_lock_irqsave(&info->slock, flags);

@@ -1048,15 +1043,15 @@ static void mxser_shutdown(struct mxser_port *info)
 	/*
 	 * Free the IRQ, if necessary
 	 */
-	if (info->xmit_buf) {
-		free_page((unsigned long) info->xmit_buf);
-		info->xmit_buf = NULL;
+	if (info->port.xmit_buf) {
+		free_page((unsigned long) info->port.xmit_buf);
+		info->port.xmit_buf = NULL;
 	}
 
 	info->IER = 0;
 	outb(0x00, info->ioaddr + UART_IER);
 
-	if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+	if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
 		info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 	outb(info->MCR, info->ioaddr + UART_MCR);
 

@@ -1072,10 +1067,10 @@ static void mxser_shutdown(struct mxser_port *info)
 	/* read data port to reset things */
 	(void) inb(info->ioaddr + UART_RX);
 
-	if (info->tty)
-		set_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (info->port.tty)
+		set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 
-	info->flags &= ~ASYNC_INITIALIZED;
+	info->port.flags &= ~ASYNC_INITIALIZED;
 
 	if (info->board->chip_flag)
 		SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);

@@ -1105,12 +1100,12 @@ static int mxser_open(struct tty_struct *tty, struct file *filp)
 		return -ENODEV;
 
 	tty->driver_data = info;
-	info->tty = tty;
+	info->port.tty = tty;
 	/*
 	 * Start up serial port
 	 */
 	spin_lock_irqsave(&info->slock, flags);
-	info->count++;
+	info->port.count++;
 	spin_unlock_irqrestore(&info->slock, flags);
 	retval = mxser_startup(info);
 	if (retval)

@@ -1170,34 +1165,34 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 		spin_unlock_irqrestore(&info->slock, flags);
 		return;
 	}
-	if ((tty->count == 1) && (info->count != 1)) {
+	if ((tty->count == 1) && (info->port.count != 1)) {
 		/*
 		 * Uh, oh.  tty->count is 1, which means that the tty
-		 * structure will be freed.  Info->count should always
+		 * structure will be freed.  Info->port.count should always
 		 * be one in these conditions.  If it's greater than
 		 * one, we've got real problems, since it means the
 		 * serial port won't be shutdown.
 		 */
 		printk(KERN_ERR "mxser_close: bad serial port count; "
-			"tty->count is 1, info->count is %d\n", info->count);
-		info->count = 1;
+			"tty->count is 1, info->port.count is %d\n", info->port.count);
+		info->port.count = 1;
 	}
-	if (--info->count < 0) {
+	if (--info->port.count < 0) {
 		printk(KERN_ERR "mxser_close: bad serial port count for "
-			"ttys%d: %d\n", tty->index, info->count);
-		info->count = 0;
+			"ttys%d: %d\n", tty->index, info->port.count);
+		info->port.count = 0;
 	}
-	if (info->count) {
+	if (info->port.count) {
 		spin_unlock_irqrestore(&info->slock, flags);
 		return;
 	}
-	info->flags |= ASYNC_CLOSING;
+	info->port.flags |= ASYNC_CLOSING;
 	spin_unlock_irqrestore(&info->slock, flags);
 	/*
 	 * Save the termios structure, since this port may have
 	 * separate termios for callout and dialin.
 	 */
-	if (info->flags & ASYNC_NORMAL_ACTIVE)
+	if (info->port.flags & ASYNC_NORMAL_ACTIVE)
 		info->normal_termios = *tty->termios;
 	/*
 	 * Now we wait for the transmit buffer to clear; and we notify

@@ -1216,7 +1211,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 	if (info->board->chip_flag)
 		info->IER &= ~MOXA_MUST_RECV_ISR;
 
-	if (info->flags & ASYNC_INITIALIZED) {
+	if (info->port.flags & ASYNC_INITIALIZED) {
 		outb(info->IER, info->ioaddr + UART_IER);
 		/*
 		 * Before we drop DTR, make sure the UART transmitter

@@ -1237,14 +1232,14 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 
 	tty->closing = 0;
 	info->event = 0;
-	info->tty = NULL;
-	if (info->blocked_open) {
+	info->port.tty = NULL;
+	if (info->port.blocked_open) {
 		if (info->close_delay)
 			schedule_timeout_interruptible(info->close_delay);
-		wake_up_interruptible(&info->open_wait);
+		wake_up_interruptible(&info->port.open_wait);
 	}
 
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
 }
 
 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)

@@ -1253,7 +1248,7 @@ static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int cou
 	struct mxser_port *info = tty->driver_data;
 	unsigned long flags;
 
-	if (!info->xmit_buf)
+	if (!info->port.xmit_buf)
 		return 0;
 
 	while (1) {

@@ -1262,7 +1257,7 @@ static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int cou
 		if (c <= 0)
 			break;
 
-		memcpy(info->xmit_buf + info->xmit_head, buf, c);
+		memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
 		spin_lock_irqsave(&info->slock, flags);
 		info->xmit_head = (info->xmit_head + c) &
 				  (SERIAL_XMIT_SIZE - 1);

@@ -1294,14 +1289,14 @@ static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
 	struct mxser_port *info = tty->driver_data;
 	unsigned long flags;
 
-	if (!info->xmit_buf)
+	if (!info->port.xmit_buf)
 		return 0;
 
 	if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
 		return 0;
 
 	spin_lock_irqsave(&info->slock, flags);
-	info->xmit_buf[info->xmit_head++] = ch;
+	info->port.xmit_buf[info->xmit_head++] = ch;
 	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
 	info->xmit_cnt++;
 	spin_unlock_irqrestore(&info->slock, flags);

@@ -1327,7 +1322,7 @@ static void mxser_flush_chars(struct tty_struct *tty)
 
 	if (info->xmit_cnt <= 0 ||
 			tty->stopped ||
-			!info->xmit_buf ||
+			!info->port.xmit_buf ||
 			(tty->hw_stopped &&
 			 (info->type != PORT_16550A) &&
 			 (!info->board->chip_flag)

@@ -1370,10 +1365,10 @@ static int mxser_get_serial_info(struct mxser_port *info,
 {
 	struct serial_struct tmp = {
 		.type = info->type,
-		.line = info->tty->index,
+		.line = info->port.tty->index,
 		.port = info->ioaddr,
 		.irq = info->board->irq,
-		.flags = info->flags,
+		.flags = info->port.flags,
 		.baud_base = info->baud_base,
 		.close_delay = info->close_delay,
 		.closing_wait = info->closing_wait,

@@ -1403,33 +1398,33 @@ static int mxser_set_serial_info(struct mxser_port *info,
 			new_serial.port != info->ioaddr)
 		return -EINVAL;
 
-	flags = info->flags & ASYNC_SPD_MASK;
+	flags = info->port.flags & ASYNC_SPD_MASK;
 
 	if (!capable(CAP_SYS_ADMIN)) {
 		if ((new_serial.baud_base != info->baud_base) ||
 				(new_serial.close_delay != info->close_delay) ||
-				((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
+				((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
 			return -EPERM;
-		info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+		info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
 				(new_serial.flags & ASYNC_USR_MASK));
 	} else {
 		/*
 		 * OK, past this point, all the error checking has been done.
 		 * At this point, we start making changes.....
 		 */
-		info->flags = ((info->flags & ~ASYNC_FLAGS) |
+		info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
 				(new_serial.flags & ASYNC_FLAGS));
 		info->close_delay = new_serial.close_delay * HZ / 100;
 		info->closing_wait = new_serial.closing_wait * HZ / 100;
-		info->tty->low_latency =
-				(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-		info->tty->low_latency = 0;
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
+		info->port.tty->low_latency =
+				(info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+		info->port.tty->low_latency = 0;
+		if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
 				(new_serial.baud_base != info->baud_base ||
 				new_serial.custom_divisor !=
 				info->custom_divisor)) {
 			baud = new_serial.baud_base / new_serial.custom_divisor;
-			tty_encode_baud_rate(info->tty, baud, baud);
+			tty_encode_baud_rate(info->port.tty, baud, baud);
 		}
 	}
 

@@ -1437,8 +1432,8 @@ static int mxser_set_serial_info(struct mxser_port *info,
 
 	process_txrx_fifo(info);
 
-	if (info->flags & ASYNC_INITIALIZED) {
-		if (flags != (info->flags & ASYNC_SPD_MASK)) {
+	if (info->port.flags & ASYNC_INITIALIZED) {
+		if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
 			spin_lock_irqsave(&info->slock, sl_flags);
 			mxser_change_speed(info, NULL);
 			spin_unlock_irqrestore(&info->slock, sl_flags);

@@ -1693,12 +1688,12 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
 					continue;
 				}
 
-				if (!port->tty || !port->tty->termios)
+				if (!port->port.tty || !port->port.tty->termios)
 					GMStatus[i].cflag =
 						port->normal_termios.c_cflag;
 				else
 					GMStatus[i].cflag =
-						port->tty->termios->c_cflag;
+						port->port.tty->termios->c_cflag;
 
 				status = inb(port->ioaddr + UART_MSR);
 				if (status & 0x80 /*UART_MSR_DCD */ )

@@ -1755,14 +1750,14 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
 				mon_data_ext.modem_status[i] =
 					port->mon_data.modem_status;
 				mon_data_ext.baudrate[i] =
-					tty_get_baud_rate(port->tty);
+					tty_get_baud_rate(port->port.tty);
 
-				if (!port->tty || !port->tty->termios) {
+				if (!port->port.tty || !port->port.tty->termios) {
 					cflag = port->normal_termios.c_cflag;
 					iflag = port->normal_termios.c_iflag;
 				} else {
-					cflag = port->tty->termios->c_cflag;
-					iflag = port->tty->termios->c_iflag;
+					cflag = port->port.tty->termios->c_cflag;
+					iflag = port->port.tty->termios->c_iflag;
 				}
 
 				mon_data_ext.databits[i] = cflag & CSIZE;

@@ -1989,7 +1984,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
 		else
 			info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
 
-		if (info->tty->hw_stopped)
+		if (info->port.tty->hw_stopped)
 			info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
 		else
 			info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;

@@ -2038,7 +2033,7 @@ static void mxser_stoprx(struct tty_struct *tty)
 		}
 	}
 
-	if (info->tty->termios->c_cflag & CRTSCTS) {
+	if (info->port.tty->termios->c_cflag & CRTSCTS) {
 		info->MCR &= ~UART_MCR_RTS;
 		outb(info->MCR, info->ioaddr + UART_MCR);
 	}

@@ -2075,7 +2070,7 @@ static void mxser_unthrottle(struct tty_struct *tty)
 		}
 	}
 
-	if (info->tty->termios->c_cflag & CRTSCTS) {
+	if (info->port.tty->termios->c_cflag & CRTSCTS) {
 		info->MCR |= UART_MCR_RTS;
 		outb(info->MCR, info->ioaddr + UART_MCR);
 	}

@@ -2106,7 +2101,7 @@ static void mxser_start(struct tty_struct *tty)
 	unsigned long flags;
 
 	spin_lock_irqsave(&info->slock, flags);
-	if (info->xmit_cnt && info->xmit_buf) {
+	if (info->xmit_cnt && info->port.xmit_buf) {
 		outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
 		info->IER |= UART_IER_THRI;
 		outb(info->IER, info->ioaddr + UART_IER);

@@ -2220,10 +2215,10 @@ static void mxser_hangup(struct tty_struct *tty)
 	mxser_flush_buffer(tty);
 	mxser_shutdown(info);
 	info->event = 0;
-	info->count = 0;
-	info->flags &= ~ASYNC_NORMAL_ACTIVE;
-	info->tty = NULL;
-	wake_up_interruptible(&info->open_wait);
+	info->port.count = 0;
+	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+	info->port.tty = NULL;
+	wake_up_interruptible(&info->port.open_wait);
 }
 
 /*

@@ -2246,7 +2241,7 @@ static void mxser_rs_break(struct tty_struct *tty, int break_state)
 
 static void mxser_receive_chars(struct mxser_port *port, int *status)
 {
-	struct tty_struct *tty = port->tty;
+	struct tty_struct *tty = port->port.tty;
 	unsigned char ch, gdl;
 	int ignored = 0;
 	int cnt = 0;

@@ -2302,7 +2297,7 @@ intr_old:
 					flag = TTY_BREAK;
 					port->icount.brk++;
 
-					if (port->flags & ASYNC_SAK)
+					if (port->port.flags & ASYNC_SAK)
 						do_SAK(tty);
 				} else if (*status & UART_LSR_PE) {
 					flag = TTY_PARITY;

@@ -2333,7 +2328,7 @@ intr_old:
 	} while (*status & UART_LSR_DR);
 
 end_intr:
-	mxvar_log.rxcnt[port->tty->index] += cnt;
+	mxvar_log.rxcnt[port->port.tty->index] += cnt;
 	port->mon_data.rxcnt += cnt;
 	port->mon_data.up_rxcnt += cnt;
 

@@ -2354,18 +2349,18 @@ static void mxser_transmit_chars(struct mxser_port *port)
 	if (port->x_char) {
 		outb(port->x_char, port->ioaddr + UART_TX);
 		port->x_char = 0;
-		mxvar_log.txcnt[port->tty->index]++;
+		mxvar_log.txcnt[port->port.tty->index]++;
 		port->mon_data.txcnt++;
 		port->mon_data.up_txcnt++;
 		port->icount.tx++;
 		return;
 	}
 
-	if (port->xmit_buf == NULL)
+	if (port->port.xmit_buf == NULL)
 		return;
 
-	if ((port->xmit_cnt <= 0) || port->tty->stopped ||
-			(port->tty->hw_stopped &&
+	if ((port->xmit_cnt <= 0) || port->port.tty->stopped ||
+			(port->port.tty->hw_stopped &&
 			(port->type != PORT_16550A) &&
 			(!port->board->chip_flag))) {
 		port->IER &= ~UART_IER_THRI;

@@ -2376,20 +2371,20 @@ static void mxser_transmit_chars(struct mxser_port *port)
 	cnt = port->xmit_cnt;
 	count = port->xmit_fifo_size;
 	do {
-		outb(port->xmit_buf[port->xmit_tail++],
+		outb(port->port.xmit_buf[port->xmit_tail++],
 			port->ioaddr + UART_TX);
 		port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
 		if (--port->xmit_cnt <= 0)
 			break;
 	} while (--count > 0);
-	mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
+	mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt);
 
 	port->mon_data.txcnt += (cnt - port->xmit_cnt);
 	port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
 	port->icount.tx += (cnt - port->xmit_cnt);
 
 	if (port->xmit_cnt < WAKEUP_CHARS)
-		tty_wakeup(port->tty);
+		tty_wakeup(port->port.tty);
 
 	if (port->xmit_cnt <= 0) {
 		port->IER &= ~UART_IER_THRI;

@@ -2440,9 +2435,9 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id)
 				if (iir & UART_IIR_NO_INT)
 					break;
 				iir &= MOXA_MUST_IIR_MASK;
-				if (!port->tty ||
-						(port->flags & ASYNC_CLOSING) ||
-						!(port->flags &
+				if (!port->port.tty ||
+						(port->port.flags & ASYNC_CLOSING) ||
+						!(port->port.flags &
 							ASYNC_INITIALIZED)) {
 					status = inb(port->ioaddr + UART_LSR);
 					outb(0x27, port->ioaddr + UART_FCR);

@@ -2558,7 +2553,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
 		if (brd->chip_flag != MOXA_OTHER_UART)
 			mxser_enable_must_enchance_mode(info->ioaddr);
 
-		info->flags = ASYNC_SHARE_IRQ;
+		info->port.flags = ASYNC_SHARE_IRQ;
 		info->type = brd->uart_type;
 
 		process_txrx_fifo(info);

@@ -2567,7 +2562,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
 		info->close_delay = 5 * HZ / 10;
 		info->closing_wait = 30 * HZ;
 		info->normal_termios = mxvar_sdriver->init_termios;
-		init_waitqueue_head(&info->open_wait);
+		tty_port_init(&info->port);
 		init_waitqueue_head(&info->delta_msr_wait);
 		memset(&info->mon_data, 0, sizeof(struct mxser_mon));
 		info->err_shadow = 0;

index f073c71..b0ba241 100644
@@ -322,7 +322,7 @@ static struct riscom_port *rc_get_port(struct riscom_board const *bp,
 	channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF;
 	if (channel < CD180_NCH)  {
 		port = &rc_port[board_No(bp) * RC_NPORT + channel];
-		if (port->flags & ASYNC_INITIALIZED)
+		if (port->port.flags & ASYNC_INITIALIZED)
 			return port;
 	}
 	printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n",

@@ -341,7 +341,7 @@ static void rc_receive_exc(struct riscom_board const *bp)
 	if (port == NULL)
 		return;
 
-	tty = port->tty;
+	tty = port->port.tty;
 
 #ifdef RC_REPORT_OVERRUN
 	status = rc_in(bp, CD180_RCSR);

@@ -364,7 +364,7 @@ static void rc_receive_exc(struct riscom_board const *bp)
 		printk(KERN_INFO "rc%d: port %d: Handling break...\n",
 		       board_No(bp), port_No(port));
 		flag = TTY_BREAK;
-		if (port->flags & ASYNC_SAK)
+		if (port->port.flags & ASYNC_SAK)
 			do_SAK(tty);
 
 	} else if (status & RCSR_PE)

@@ -392,7 +392,7 @@ static void rc_receive(struct riscom_board const *bp)
 	if (port == NULL)
 		return;
 
-	tty = port->tty;
+	tty = port->port.tty;
 
 	count = rc_in(bp, CD180_RDCR);
 

@@ -422,7 +422,7 @@ static void rc_transmit(struct riscom_board const *bp)
 	if (port == NULL)
 		return;
 
-	tty = port->tty;
+	tty = port->port.tty;
 
 	if (port->IER & IER_TXEMPTY) {
 		/* FIFO drained */

@@ -467,7 +467,7 @@ static void rc_transmit(struct riscom_board const *bp)
 
 	count = CD180_NFIFO;
 	do {
-		rc_out(bp, CD180_TDR, port->xmit_buf[port->xmit_tail++]);
+		rc_out(bp, CD180_TDR, port->port.xmit_buf[port->xmit_tail++]);
 		port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
 		if (--port->xmit_cnt <= 0)
 			break;

@@ -492,12 +492,12 @@ static void rc_check_modem(struct riscom_board const *bp)
 	if (port == NULL)
 		return;
 
-	tty = port->tty;
+	tty = port->port.tty;
 
 	mcr = rc_in(bp, CD180_MCR);
 	if (mcr & MCR_CDCHG) {
 		if (rc_in(bp, CD180_MSVR) & MSVR_CD)
-			wake_up_interruptible(&port->open_wait);
+			wake_up_interruptible(&port->port.open_wait);
 		else
 			tty_hangup(tty);
 	}

@@ -632,7 +632,7 @@ static void rc_shutdown_board(struct riscom_board *bp)
  */
 static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port)
 {
-	struct tty_struct *tty = port->tty;
+	struct tty_struct *tty = port->port.tty;
 	unsigned long baud;
 	long tmp;
 	unsigned char cor1 = 0, cor3 = 0;

@@ -786,28 +786,21 @@ static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port)
 {
 	unsigned long flags;
 
-	if (port->flags & ASYNC_INITIALIZED)
+	if (port->port.flags & ASYNC_INITIALIZED)
 		return 0;
 
-	if (!port->xmit_buf) {
-		/* We may sleep in get_zeroed_page() */
-		unsigned long tmp = get_zeroed_page(GFP_KERNEL);
-		if (tmp == 0)
-			return -ENOMEM;
-		if (port->xmit_buf)
-			free_page(tmp);
-		else
-			port->xmit_buf = (unsigned char *) tmp;
-	}
+	if (tty_port_alloc_xmit_buf(&port->port) < 0)
+		return -ENOMEM;
+
 	spin_lock_irqsave(&riscom_lock, flags);
 
-	if (port->tty)
-		clear_bit(TTY_IO_ERROR, &port->tty->flags);
-	if (port->count == 1)
+	if (port->port.tty)
+		clear_bit(TTY_IO_ERROR, &port->port.tty->flags);
+	if (port->port.count == 1)
 		bp->count++;
 	port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
 	rc_change_speed(bp, port);
-	port->flags |= ASYNC_INITIALIZED;
+	port->port.flags |= ASYNC_INITIALIZED;
 
 	spin_unlock_irqrestore(&riscom_lock, flags);
 	return 0;

@@ -818,7 +811,7 @@ static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port)
 {
 	struct tty_struct *tty;
 
-	if (!(port->flags & ASYNC_INITIALIZED))
+	if (!(port->port.flags & ASYNC_INITIALIZED))
 		return;
 
 #ifdef RC_REPORT_OVERRUN

@@ -836,12 +829,9 @@ static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port)
 		printk("].\n");
 	}
 #endif
-	if (port->xmit_buf)  {
-		free_page((unsigned long) port->xmit_buf);
-		port->xmit_buf = NULL;
-	}
+	tty_port_free_xmit_buf(&port->port);
 
-	tty = port->tty;
+	tty = port->port.tty;
 
 	if (tty == NULL || C_HUPCL(tty)) {
 		/* Drop DTR */

@@ -860,7 +850,7 @@ static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port)
 
 	if (tty)
 		set_bit(TTY_IO_ERROR, &tty->flags);
-	port->flags &= ~ASYNC_INITIALIZED;
+	port->port.flags &= ~ASYNC_INITIALIZED;
 
 	if (--bp->count < 0)  {
 		printk(KERN_INFO "rc%d: rc_shutdown_port: "

@@ -890,9 +880,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	 * If the device is in the middle of being closed, then block
 	 * until it's done, and then try again.
 	 */
-	if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&port->close_wait);
-		if (port->flags & ASYNC_HUP_NOTIFY)
+	if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
+		interruptible_sleep_on(&port->port.close_wait);
+		if (port->port.flags & ASYNC_HUP_NOTIFY)
 			return -EAGAIN;
 		else
 			return -ERESTARTSYS;

@@ -904,7 +894,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	 */
 	if ((filp->f_flags & O_NONBLOCK) ||
 	    (tty->flags & (1 << TTY_IO_ERROR))) {
-		port->flags |= ASYNC_NORMAL_ACTIVE;
+		port->port.flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 

@@ -919,16 +909,16 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	 * exit, either normal or abnormal.
 	 */
 	retval = 0;
-	add_wait_queue(&port->open_wait, &wait);
+	add_wait_queue(&port->port.open_wait, &wait);
 
 	spin_lock_irqsave(&riscom_lock, flags);
 
 	if (!tty_hung_up_p(filp))
-		port->count--;
+		port->port.count--;
 
 	spin_unlock_irqrestore(&riscom_lock, flags);
 
-	port->blocked_open++;
+	port->port.blocked_open++;
 	while (1) {
 		spin_lock_irqsave(&riscom_lock, flags);
 

@@ -942,14 +932,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 
 		set_current_state(TASK_INTERRUPTIBLE);
 		if (tty_hung_up_p(filp) ||
-		    !(port->flags & ASYNC_INITIALIZED)) {
-			if (port->flags & ASYNC_HUP_NOTIFY)
+		    !(port->port.flags & ASYNC_INITIALIZED)) {
+			if (port->port.flags & ASYNC_HUP_NOTIFY)
 				retval = -EAGAIN;
 			else
 				retval = -ERESTARTSYS;
 			break;
 		}
-		if (!(port->flags & ASYNC_CLOSING) &&
+		if (!(port->port.flags & ASYNC_CLOSING) &&
 		    (do_clocal || CD))
 			break;
 		if (signal_pending(current)) {

@@ -959,14 +949,14 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 		schedule();
 	}
 	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->open_wait, &wait);
+	remove_wait_queue(&port->port.open_wait, &wait);
 	if (!tty_hung_up_p(filp))
-		port->count++;
-	port->blocked_open--;
+		port->port.count++;
+	port->port.blocked_open--;
 	if (retval)
 		return retval;
 
-	port->flags |= ASYNC_NORMAL_ACTIVE;
+	port->port.flags |= ASYNC_NORMAL_ACTIVE;
 	return 0;
 }
 

@@ -990,9 +980,9 @@ static int rc_open(struct tty_struct *tty, struct file *filp)
 	if (error)
 		return error;
 
-	port->count++;
+	port->port.count++;
 	tty->driver_data = port;
-	port->tty = tty;
+	port->port.tty = tty;
 
 	error = rc_setup_port(bp, port);
 	if (error == 0)

@@ -1031,21 +1021,21 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
 		goto out;
 
 	bp = port_Board(port);
-	if ((tty->count == 1) && (port->count != 1))  {
+	if ((tty->count == 1) && (port->port.count != 1))  {
 		printk(KERN_INFO "rc%d: rc_close: bad port count;"
 		       " tty->count is 1, port count is %d\n",
-		       board_No(bp), port->count);
-		port->count = 1;
+		       board_No(bp), port->port.count);
+		port->port.count = 1;
 	}
-	if (--port->count < 0)  {
+	if (--port->port.count < 0)  {
 		printk(KERN_INFO "rc%d: rc_close: bad port count "
 				 "for tty%d: %d\n",
-		       board_No(bp), port_No(port), port->count);
-		port->count = 0;
+		       board_No(bp), port_No(port), port->port.count);
+		port->port.count = 0;
 	}
-	if (port->count)
+	if (port->port.count)
 		goto out;
-	port->flags |= ASYNC_CLOSING;
+	port->port.flags |= ASYNC_CLOSING;
 	/*
 	 * Now we wait for the transmit buffer to clear; and we notify
 	 * the line discipline to only process XON/XOFF characters.

@@ -1060,7 +1050,7 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
 	 * line status register.
 	 */
 	port->IER &= ~IER_RXD;
-	if (port->flags & ASYNC_INITIALIZED) {
+	if (port->port.flags & ASYNC_INITIALIZED) {
 		port->IER &= ~IER_TXRDY;
 		port->IER |= IER_TXEMPTY;
 		rc_out(bp, CD180_CAR, port_No(port));

@@ -1082,14 +1072,14 @@ static void rc_close(struct tty_struct *tty, struct file *filp)
 	tty_ldisc_flush(tty);
 
 	tty->closing = 0;
-	port->tty = NULL;
-	if (port->blocked_open) {
+	port->port.tty = NULL;
+	if (port->port.blocked_open) {
 		if (port->close_delay)
 			msleep_interruptible(jiffies_to_msecs(port->close_delay));
-		wake_up_interruptible(&port->open_wait);
+		wake_up_interruptible(&port->port.open_wait);
 	}
-	port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-	wake_up_interruptible(&port->close_wait);
+	port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+	wake_up_interruptible(&port->port.close_wait);
 
 out:
 	spin_unlock_irqrestore(&riscom_lock, flags);

@@ -1108,7 +1098,7 @@ static int rc_write(struct tty_struct *tty,
 
 	bp = port_Board(port);
 
-	if (!tty || !port->xmit_buf)
+	if (!tty || !port->port.xmit_buf)
 		return 0;
 
 	while (1) {

@@ -1119,7 +1109,7 @@ static int rc_write(struct tty_struct *tty,
 		if (c <= 0)
 			break;	/* lock continues to be held */
 
-		memcpy(port->xmit_buf + port->xmit_head, buf, c);
+		memcpy(port->port.xmit_buf + port->xmit_head, buf, c);
 		port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
 		port->xmit_cnt += c;
 

@@ -1151,7 +1141,7 @@ static int rc_put_char(struct tty_struct *tty, unsigned char ch)
 	if (rc_paranoia_check(port, tty->name, "rc_put_char"))
 		return 0;
 
-	if (!tty || !port->xmit_buf)
+	if (!tty || !port->port.xmit_buf)
 		return 0;
 
 	spin_lock_irqsave(&riscom_lock, flags);

@@ -1159,7 +1149,7 @@ static int rc_put_char(struct tty_struct *tty, unsigned char ch)
 	if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
 		goto out;
 
-	port->xmit_buf[port->xmit_head++] = ch;
+	port->port.xmit_buf[port->xmit_head++] = ch;
 	port->xmit_head &= SERIAL_XMIT_SIZE - 1;
 	port->xmit_cnt++;
 	ret = 1;

@@ -1178,7 +1168,7 @@ static void rc_flush_chars(struct tty_struct *tty)
 		return;
 
 	if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
-	    !port->xmit_buf)
+	    !port->port.xmit_buf)
 		return;
 
 	spin_lock_irqsave(&riscom_lock, flags);

@@ -1317,19 +1307,19 @@ static int rc_set_serial_info(struct riscom_port *port,
 		return -EINVAL;
 #endif
 
-	change_speed = ((port->flags & ASYNC_SPD_MASK) !=
+	change_speed = ((port->port.flags & ASYNC_SPD_MASK) !=
 			(tmp.flags & ASYNC_SPD_MASK));
 
 	if (!capable(CAP_SYS_ADMIN)) {
 		if ((tmp.close_delay != port->close_delay) ||
 		    (tmp.closing_wait != port->closing_wait) ||
 		    ((tmp.flags & ~ASYNC_USR_MASK) !=
-		     (port->flags & ~ASYNC_USR_MASK)))
+		     (port->port.flags & ~ASYNC_USR_MASK)))
 			return -EPERM;
-		port->flags = ((port->flags & ~ASYNC_USR_MASK) |
+		port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
 			       (tmp.flags & ASYNC_USR_MASK));
 	} else  {
-		port->flags = ((port->flags & ~ASYNC_FLAGS) |
+		port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
 			       (tmp.flags & ASYNC_FLAGS));
 		port->close_delay = tmp.close_delay;
 		port->closing_wait = tmp.closing_wait;

@@ -1355,7 +1345,7 @@ static int rc_get_serial_info(struct riscom_port *port,
 	tmp.line = port - rc_port;
 	tmp.port = bp->base;
 	tmp.irq  = bp->irq;
-	tmp.flags = port->flags;
+	tmp.flags = port->port.flags;
 	tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC;
 	tmp.close_delay = port->close_delay * HZ/100;
 	tmp.closing_wait = port->closing_wait * HZ/100;

@@ -1480,7 +1470,7 @@ static void rc_start(struct tty_struct *tty)
 
 	spin_lock_irqsave(&riscom_lock, flags);
 
-	if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
+	if (port->xmit_cnt && port->port.xmit_buf && !(port->IER & IER_TXRDY)) {
 		port->IER |= IER_TXRDY;
 		rc_out(bp, CD180_CAR, port_No(port));
 		rc_out(bp, CD180_IER, port->IER);

@@ -1499,10 +1489,10 @@ static void rc_hangup(struct tty_struct *tty)
 	bp = port_Board(port);
 
 	rc_shutdown_port(bp, port);
-	port->count = 0;
-	port->flags &= ~ASYNC_NORMAL_ACTIVE;
-	port->tty = NULL;
-	wake_up_interruptible(&port->open_wait);
+	port->port.count = 0;
+	port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+	port->port.tty = NULL;
+	wake_up_interruptible(&port->port.open_wait);
 }
 
 static void rc_set_termios(struct tty_struct *tty,

@@ -1578,8 +1568,7 @@ static int __init rc_init_drivers(void)
 		rc_port[i].magic = RISCOM8_MAGIC;
 		rc_port[i].close_delay = 50 * HZ / 100;
 		rc_port[i].closing_wait = 3000 * HZ / 100;
-		init_waitqueue_head(&rc_port[i].open_wait);
-		init_waitqueue_head(&rc_port[i].close_wait);
+		tty_port_init(&rc_port[i].port);
 	}
 	return 0;
 }

index cdfdf43..29ddbab 100644
@@ -66,20 +66,14 @@ struct riscom_board {
 	
 struct riscom_port {
 	int			magic;
+	struct			tty_port port;
 	int			baud_base;
-	int			flags;
-	struct tty_struct 	* tty;
-	int			count;
-	int			blocked_open;
 	int			timeout;
 	int			close_delay;
-	unsigned char 		* xmit_buf;
 	int			custom_divisor;
 	int			xmit_head;
 	int			xmit_tail;
 	int			xmit_cnt;
-	wait_queue_head_t	open_wait;
-	wait_queue_head_t	close_wait;
 	short			wakeup_chars;
 	short			break_length;
 	unsigned short		closing_wait;

index 743dc80..ab04adb 100644
@@ -434,15 +434,15 @@ static void rp_do_transmit(struct r_port *info)
 #endif
 	if (!info)
 		return;
-	if (!info->tty) {
+	if (!info->port.tty) {
 		printk(KERN_WARNING "rp: WARNING %s called with "
-				"info->tty==NULL\n", __func__);
+				"info->port.tty==NULL\n", __func__);
 		clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 		return;
 	}
 
 	spin_lock_irqsave(&info->slock, flags);
-	tty = info->tty;
+	tty = info->port.tty;
 	info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
 
 	/*  Loop sending data to FIFO until done or FIFO full */

@@ -502,13 +502,13 @@ static void rp_handle_port(struct r_port *info)
 				"info->flags & NOT_INIT\n");
 		return;
 	}
-	if (!info->tty) {
+	if (!info->port.tty) {
 		printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
-				"info->tty==NULL\n");
+				"info->port.tty==NULL\n");
 		return;
 	}
 	cp = &info->channel;
-	tty = info->tty;
+	tty = info->port.tty;
 
 	IntMask = sGetChanIntID(cp) & info->intmask;
 #ifdef ROCKET_DEBUG_INTR

@@ -530,7 +530,7 @@ static void rp_handle_port(struct r_port *info)
 			tty_hangup(tty);
 		}
 		info->cd_status = (ChanStatus & CD_ACT) ? 1 : 0;
-		wake_up_interruptible(&info->open_wait);
+		wake_up_interruptible(&info->port.open_wait);
 	}
 #ifdef ROCKET_DEBUG_INTR
 	if (IntMask & DELTA_CTS) {	/* CTS change */

@@ -650,7 +650,7 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
 	info->chan = chan;
 	info->closing_wait = 3000;
 	info->close_delay = 50;
-	init_waitqueue_head(&info->open_wait);
+	init_waitqueue_head(&info->port.open_wait);
 	init_completion(&info->close_wait);
 	info->flags &= ~ROCKET_MODE_MASK;
 	switch (pc104[board][line]) {

@@ -717,7 +717,7 @@ static void configure_r_port(struct r_port *info,
 	unsigned rocketMode;
 	int bits, baud, divisor;
 	CHANNEL_t *cp;
-	struct ktermios *t = info->tty->termios;
+	struct ktermios *t = info->port.tty->termios;
 
 	cp = &info->channel;
 	cflag = t->c_cflag;

@@ -750,7 +750,7 @@ static void configure_r_port(struct r_port *info,
 	}
 
 	/* baud rate */
-	baud = tty_get_baud_rate(info->tty);
+	baud = tty_get_baud_rate(info->port.tty);
 	if (!baud)
 		baud = 9600;
 	divisor = ((rp_baud_base[info->board] + (baud >> 1)) / baud) - 1;

@@ -768,7 +768,7 @@ static void configure_r_port(struct r_port *info,
 	sSetBaud(cp, divisor);
 
 	/* FIXME: Should really back compute a baud rate from the divisor */
-	tty_encode_baud_rate(info->tty, baud, baud);
+	tty_encode_baud_rate(info->port.tty, baud, baud);
 
 	if (cflag & CRTSCTS) {
 		info->intmask |= DELTA_CTS;

@@ -793,15 +793,15 @@ static void configure_r_port(struct r_port *info,
 	 * Handle software flow control in the board
 	 */
 #ifdef ROCKET_SOFT_FLOW
-	if (I_IXON(info->tty)) {
+	if (I_IXON(info->port.tty)) {
 		sEnTxSoftFlowCtl(cp);
-		if (I_IXANY(info->tty)) {
+		if (I_IXANY(info->port.tty)) {
 			sEnIXANY(cp);
 		} else {
 			sDisIXANY(cp);
 		}
-		sSetTxXONChar(cp, START_CHAR(info->tty));
-		sSetTxXOFFChar(cp, STOP_CHAR(info->tty));
+		sSetTxXONChar(cp, START_CHAR(info->port.tty));
+		sSetTxXOFFChar(cp, STOP_CHAR(info->port.tty));
 	} else {
 		sDisTxSoftFlowCtl(cp);
 		sDisIXANY(cp);

@@ -813,24 +813,24 @@ static void configure_r_port(struct r_port *info,
 	 * Set up ignore/read mask words
 	 */
 	info->read_status_mask = STMRCVROVRH | 0xFF;
-	if (I_INPCK(info->tty))
+	if (I_INPCK(info->port.tty))
 		info->read_status_mask |= STMFRAMEH | STMPARITYH;
-	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
 		info->read_status_mask |= STMBREAKH;
 
 	/*
 	 * Characters to ignore
 	 */
 	info->ignore_status_mask = 0;
-	if (I_IGNPAR(info->tty))
+	if (I_IGNPAR(info->port.tty))
 		info->ignore_status_mask |= STMFRAMEH | STMPARITYH;
-	if (I_IGNBRK(info->tty)) {
+	if (I_IGNBRK(info->port.tty)) {
 		info->ignore_status_mask |= STMBREAKH;
 		/*
 		 * If we're ignoring parity and break indicators,
 		 * ignore overruns too.  (For real raw support).
 		 */
-		if (I_IGNPAR(info->tty))
+		if (I_IGNPAR(info->port.tty))
 			info->ignore_status_mask |= STMRCVROVRH;
 	}
 

@@ -863,7 +863,7 @@ static void configure_r_port(struct r_port *info,
 	}
 }
 
-/*  info->count is considered critical, protected by spinlocks.  */
+/*  info->port.count is considered critical, protected by spinlocks.  */
 static int block_til_ready(struct tty_struct *tty, struct file *filp,
 			   struct r_port *info)
 {

@@ -897,13 +897,13 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 
 	/*
 	 * Block waiting for the carrier detect and the line to become free.  While we are in
-	 * this loop, info->count is dropped by one, so that rp_close() knows when to free things.  
+	 * this loop, info->port.count is dropped by one, so that rp_close() knows when to free things.  
          * We restore it upon exit, either normal or abnormal.
 	 */
 	retval = 0;
-	add_wait_queue(&info->open_wait, &wait);
+	add_wait_queue(&info->port.open_wait, &wait);
 #ifdef ROCKET_DEBUG_OPEN
-	printk(KERN_INFO "block_til_ready before block: ttyR%d, count = %d\n", info->line, info->count);
+	printk(KERN_INFO "block_til_ready before block: ttyR%d, count = %d\n", info->line, info->port.count);
 #endif
 	spin_lock_irqsave(&info->slock, flags);
 

@@ -912,10 +912,10 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 #else
 	if (!tty_hung_up_p(filp)) {
 		extra_count = 1;
-		info->count--;
+		info->port.count--;
 	}
 #endif
-	info->blocked_open++;
+	info->port.blocked_open++;
 
 	spin_unlock_irqrestore(&info->slock, flags);
 

@@ -940,24 +940,24 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 		}
 #ifdef ROCKET_DEBUG_OPEN
 		printk(KERN_INFO "block_til_ready blocking: ttyR%d, count = %d, flags=0x%0x\n",
-		     info->line, info->count, info->flags);
+		     info->line, info->port.count, info->flags);
 #endif
 		schedule();	/*  Don't hold spinlock here, will hang PC */
 	}
 	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->open_wait, &wait);
+	remove_wait_queue(&info->port.open_wait, &wait);
 
 	spin_lock_irqsave(&info->slock, flags);
 
 	if (extra_count)
-		info->count++;
-	info->blocked_open--;
+		info->port.count++;
+	info->port.blocked_open--;
 
 	spin_unlock_irqrestore(&info->slock, flags);
 
 #ifdef ROCKET_DEBUG_OPEN
 	printk(KERN_INFO "block_til_ready after blocking: ttyR%d, count = %d\n",
-	       info->line, info->count);
+	       info->line, info->port.count);
 #endif
 	if (retval)
 		return retval;

@@ -1001,9 +1001,9 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 		info->xmit_buf = (unsigned char *) page;
 
 	tty->driver_data = info;
-	info->tty = tty;
+	info->port.tty = tty;
 
-	if (info->count++ == 0) {
+	if (info->port.count++ == 0) {
 		atomic_inc(&rp_num_ports_open);
 
 #ifdef ROCKET_DEBUG_OPEN

@@ -1012,7 +1012,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 #endif
 	}
 #ifdef ROCKET_DEBUG_OPEN
-	printk(KERN_INFO "rp_open ttyR%d, count=%d\n", info->line, info->count);
+	printk(KERN_INFO "rp_open ttyR%d, count=%d\n", info->line, info->port.count);
 #endif
 
 	/*

@@ -1048,13 +1048,13 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 		 * Set up the tty->alt_speed kludge
 		 */
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
-			info->tty->alt_speed = 57600;
+			info->port.tty->alt_speed = 57600;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
-			info->tty->alt_speed = 115200;
+			info->port.tty->alt_speed = 115200;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
-			info->tty->alt_speed = 230400;
+			info->port.tty->alt_speed = 230400;
 		if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
-			info->tty->alt_speed = 460800;
+			info->port.tty->alt_speed = 460800;
 
 		configure_r_port(info, NULL);
 		if (tty->termios->c_cflag & CBAUD) {

@@ -1076,7 +1076,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 }
 
 /*
- *  Exception handler that closes a serial port. info->count is considered critical. 
+ *  Exception handler that closes a serial port. info->port.count is considered critical. 
  */
 static void rp_close(struct tty_struct *tty, struct file *filp)
 {

@@ -1089,14 +1089,14 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 		return;
 
 #ifdef ROCKET_DEBUG_OPEN
-	printk(KERN_INFO "rp_close ttyR%d, count = %d\n", info->line, info->count);
+	printk(KERN_INFO "rp_close ttyR%d, count = %d\n", info->line, info->port.count);
 #endif
 
 	if (tty_hung_up_p(filp))
 		return;
 	spin_lock_irqsave(&info->slock, flags);
 
-	if ((tty->count == 1) && (info->count != 1)) {
+	if ((tty->count == 1) && (info->port.count != 1)) {
 		/*
 		 * Uh, oh.  tty->count is 1, which means that the tty
 		 * structure will be freed.  Info->count should always

@@ -1105,15 +1105,15 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 		 * serial port won't be shutdown.
 		 */
 		printk(KERN_WARNING "rp_close: bad serial port count; "
-			"tty->count is 1, info->count is %d\n", info->count);
-		info->count = 1;
+			"tty->count is 1, info->port.count is %d\n", info->port.count);
+		info->port.count = 1;
 	}
-	if (--info->count < 0) {
+	if (--info->port.count < 0) {
 		printk(KERN_WARNING "rp_close: bad serial port count for "
-				"ttyR%d: %d\n", info->line, info->count);
-		info->count = 0;
+				"ttyR%d: %d\n", info->line, info->port.count);
+		info->port.count = 0;
 	}
-	if (info->count) {
+	if (info->port.count) {
 		spin_unlock_irqrestore(&info->slock, flags);
 		return;
 	}

@@ -1167,11 +1167,11 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 
 	clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 
-	if (info->blocked_open) {
+	if (info->port.blocked_open) {
 		if (info->close_delay) {
 			msleep_interruptible(jiffies_to_msecs(info->close_delay));
 		}
-		wake_up_interruptible(&info->open_wait);
+		wake_up_interruptible(&info->port.open_wait);
 	} else {
 		if (info->xmit_buf) {
 			free_page((unsigned long) info->xmit_buf);

@@ -1357,13 +1357,13 @@ static int set_config(struct r_port *info, struct rocket_config __user *new_info
 	info->closing_wait = new_serial.closing_wait;
 
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
-		info->tty->alt_speed = 57600;
+		info->port.tty->alt_speed = 57600;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
-		info->tty->alt_speed = 115200;
+		info->port.tty->alt_speed = 115200;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
-		info->tty->alt_speed = 230400;
+		info->port.tty->alt_speed = 230400;
 	if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
-		info->tty->alt_speed = 460800;
+		info->port.tty->alt_speed = 460800;
 
 	configure_r_port(info, NULL);
 	return 0;

@@ -1636,13 +1636,13 @@ static void rp_hangup(struct tty_struct *tty)
 	rp_flush_buffer(tty);
 	if (info->flags & ROCKET_CLOSING)
 		return;
-	if (info->count) 
+	if (info->port.count) 
 		atomic_dec(&rp_num_ports_open);
 	clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
 
-	info->count = 0;
+	info->port.count = 0;
 	info->flags &= ~ROCKET_NORMAL_ACTIVE;
-	info->tty = NULL;
+	info->port.tty = NULL;
 
 	cp = &info->channel;
 	sDisRxFIFO(cp);

@@ -1653,7 +1653,7 @@ static void rp_hangup(struct tty_struct *tty)
 	sClrTxXOFF(cp);
 	info->flags &= ~ROCKET_INITIALIZED;
 
-	wake_up_interruptible(&info->open_wait);
+	wake_up_interruptible(&info->port.open_wait);
 }
 
 /*

@@ -1762,7 +1762,7 @@ static int rp_write(struct tty_struct *tty,
 
 	/*  Write remaining data into the port's xmit_buf */
 	while (1) {
-		if (!info->tty)		/* Seemingly obligatory check... */
+		if (!info->port.tty)		/* Seemingly obligatory check... */
 			goto end;
 		c = min(count, XMIT_BUF_SIZE - info->xmit_cnt - 1);
 		c = min(c, XMIT_BUF_SIZE - info->xmit_head);

index 143cc43..3affc48 100644
@@ -1125,11 +1125,9 @@ Warnings: This function writes the data byte without checking to see if
 
 struct r_port {
 	int magic;
+	struct tty_port port;
 	int line;
-	int flags;
-	int count;
-	int blocked_open;
-	struct tty_struct *tty;
+	int flags;		/* Don't yet match the ASY_ flags!! */
 	unsigned int board:3;
 	unsigned int aiop:2;
 	unsigned int chan:3;

@@ -1148,8 +1146,7 @@ struct r_port {
 	int read_status_mask;
 	int cps;
 
-	wait_queue_head_t open_wait;
-	struct completion close_wait;
+	struct completion close_wait;	/* Not yet matching the core */
 	spinlock_t slock;
 	struct mutex write_mtx;
 };

index ac5080d..0678f61 100644
@@ -180,8 +180,7 @@ struct tx_holding_buffer {
  
 struct mgsl_struct {
 	int			magic;
-	int			flags;
-	int			count;		/* count of opens */
+	struct tty_port		port;
 	int			line;
 	int                     hw_version;
 	unsigned short		close_delay;

@@ -189,10 +188,8 @@ struct mgsl_struct {
 	
 	struct mgsl_icount	icount;
 	
-	struct tty_struct 	*tty;
 	int			timeout;
 	int			x_char;		/* xon/xoff character */
-	int			blocked_open;	/* # of blocked opens */
 	u16			read_status_mask;
 	u16			ignore_status_mask;	
 	unsigned char 		*xmit_buf;

@@ -200,9 +197,6 @@ struct mgsl_struct {
 	int			xmit_tail;
 	int			xmit_cnt;
 	
-	wait_queue_head_t	open_wait;
-	wait_queue_head_t	close_wait;
-	
 	wait_queue_head_t	status_event_wait_q;
 	wait_queue_head_t	event_wait_q;
 	struct timer_list	tx_timer;	/* HDLC transmit timeout timer */

@@ -1134,7 +1128,7 @@ static void mgsl_bh_receive(struct mgsl_struct *info)
 
 static void mgsl_bh_transmit(struct mgsl_struct *info)
 {
-	struct tty_struct *tty = info->tty;
+	struct tty_struct *tty = info->port.tty;
 	unsigned long flags;
 	
 	if ( debug_level >= DEBUG_LEVEL_BH )

@@ -1276,7 +1270,7 @@ static void mgsl_isr_transmit_status( struct mgsl_struct *info )
 	else 
 #endif
 	{
-		if (info->tty->stopped || info->tty->hw_stopped) {
+		if (info->port.tty->stopped || info->port.tty->hw_stopped) {
 			usc_stop_transmitter(info);
 			return;
 		}

@@ -1357,29 +1351,29 @@ static void mgsl_isr_io_pin( struct mgsl_struct *info )
 		wake_up_interruptible(&info->status_event_wait_q);
 		wake_up_interruptible(&info->event_wait_q);
 
-		if ( (info->flags & ASYNC_CHECK_CD) && 
+		if ( (info->port.flags & ASYNC_CHECK_CD) && 
 		     (status & MISCSTATUS_DCD_LATCHED) ) {
 			if ( debug_level >= DEBUG_LEVEL_ISR )
 				printk("%s CD now %s...", info->device_name,
 				       (status & MISCSTATUS_DCD) ? "on" : "off");
 			if (status & MISCSTATUS_DCD)
-				wake_up_interruptible(&info->open_wait);
+				wake_up_interruptible(&info->port.open_wait);
 			else {
 				if ( debug_level >= DEBUG_LEVEL_ISR )
 					printk("doing serial hangup...");
-				if (info->tty)
-					tty_hangup(info->tty);
+				if (info->port.tty)
+					tty_hangup(info->port.tty);
 			}
 		}
 	
-		if ( (info->flags & ASYNC_CTS_FLOW) && 
+		if ( (info->port.flags & ASYNC_CTS_FLOW) && 
 		     (status & MISCSTATUS_CTS_LATCHED) ) {
-			if (info->tty->hw_stopped) {
+			if (info->port.tty->hw_stopped) {
 				if (status & MISCSTATUS_CTS) {
 					if ( debug_level >= DEBUG_LEVEL_ISR )
 						printk("CTS tx start...");
-					if (info->tty)
-						info->tty->hw_stopped = 0;
+					if (info->port.tty)
+						info->port.tty->hw_stopped = 0;
 					usc_start_transmitter(info);
 					info->pending_bh |= BH_TRANSMIT;
 					return;

@@ -1388,8 +1382,8 @@ static void mgsl_isr_io_pin( struct mgsl_struct *info )
 				if (!(status & MISCSTATUS_CTS)) {
 					if ( debug_level >= DEBUG_LEVEL_ISR )
 						printk("CTS tx stop...");
-					if (info->tty)
-						info->tty->hw_stopped = 1;
+					if (info->port.tty)
+						info->port.tty->hw_stopped = 1;
 					usc_stop_transmitter(info);
 				}
 			}

@@ -1423,7 +1417,7 @@ static void mgsl_isr_transmit_data( struct mgsl_struct *info )
 			
 	usc_ClearIrqPendingBits( info, TRANSMIT_DATA );
 	
-	if (info->tty->stopped || info->tty->hw_stopped) {
+	if (info->port.tty->stopped || info->port.tty->hw_stopped) {
 		usc_stop_transmitter(info);
 		return;
 	}

@@ -1453,7 +1447,7 @@ static void mgsl_isr_receive_data( struct mgsl_struct *info )
 	u16 status;
 	int work = 0;
 	unsigned char DataByte;
- 	struct tty_struct *tty = info->tty;
+ 	struct tty_struct *tty = info->port.tty;
  	struct	mgsl_icount *icount = &info->icount;
 	
 	if ( debug_level >= DEBUG_LEVEL_ISR )	

@@ -1514,7 +1508,7 @@ static void mgsl_isr_receive_data( struct mgsl_struct *info )
 		
 			if (status & RXSTATUS_BREAK_RECEIVED) {
 				flag = TTY_BREAK;
-				if (info->flags & ASYNC_SAK)
+				if (info->port.flags & ASYNC_SAK)
 					do_SAK(tty);
 			} else if (status & RXSTATUS_PARITY_ERROR)
 				flag = TTY_PARITY;

@@ -1771,7 +1765,7 @@ static int startup(struct mgsl_struct * info)
 	if ( debug_level >= DEBUG_LEVEL_INFO )
 		printk("%s(%d):mgsl_startup(%s)\n",__FILE__,__LINE__,info->device_name);
 		
-	if (info->flags & ASYNC_INITIALIZED)
+	if (info->port.flags & ASYNC_INITIALIZED)
 		return 0;
 	
 	if (!info->xmit_buf) {

@@ -1798,8 +1792,8 @@ static int startup(struct mgsl_struct * info)
 		retval = mgsl_adapter_test(info);
 		
 	if ( retval ) {
-  		if (capable(CAP_SYS_ADMIN) && info->tty)
-			set_bit(TTY_IO_ERROR, &info->tty->flags);
+  		if (capable(CAP_SYS_ADMIN) && info->port.tty)
+			set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 		mgsl_release_resources(info);
   		return retval;
   	}

@@ -1807,10 +1801,10 @@ static int startup(struct mgsl_struct * info)
 	/* program hardware for current parameters */
 	mgsl_change_params(info);
 	
-	if (info->tty)
-		clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (info->port.tty)
+		clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
 
-	info->flags |= ASYNC_INITIALIZED;
+	info->port.flags |= ASYNC_INITIALIZED;
 	
 	return 0;
 	

@@ -1827,7 +1821,7 @@ static void shutdown(struct mgsl_struct * info)
 {
 	unsigned long flags;
 	
-	if (!(info->flags & ASYNC_INITIALIZED))
+	if (!(info->port.flags & ASYNC_INITIALIZED))
 		return;
 
 	if (debug_level >= DEBUG_LEVEL_INFO)

@@ -1864,7 +1858,7 @@ static void shutdown(struct mgsl_struct * info)
 	/* on the ISA adapter. This has no effect for the PCI adapter */
 	usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12));
 	
- 	if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
+ 	if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
  		info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
 		usc_set_serial_signals(info);
 	}

@@ -1873,10 +1867,10 @@ static void shutdown(struct mgsl_struct * info)
 
 	mgsl_release_resources(info);	
 	
-	if (info->tty)
-		set_bit(TTY_IO_ERROR, &info->tty->flags);
+	if (info->port.tty)
+		set_bit(TTY_IO_ERROR, &info->port.tty->flags);
 
-	info->flags &= ~ASYNC_INITIALIZED;
+	info->port.flags &= ~ASYNC_INITIALIZED;
 	
 }	/* end of shutdown() */
 

@@ -1908,7 +1902,7 @@ static void mgsl_program_hw(struct mgsl_struct *info)
 	usc_EnableInterrupts(info, IO_PIN);
 	usc_get_serial_signals(info);
 		
-	if (info->netcount || info->tty->termios->c_cflag & CREAD)
+	if (info->netcount || info->port.tty->termios->c_cflag & CREAD)
 		usc_start_receiver(info);
 		
 	spin_unlock_irqrestore(&info->irq_spinlock,flags);

@@ -1921,14 +1915,14 @@ static void mgsl_change_params(struct mgsl_struct *info)
 	unsigned cflag;
 	int bits_per_char;
 
-	if (!info->tty || !info->tty->termios)
+	if (!info->port.tty || !info->port.tty->termios)
 		return;
 		
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_change_params(%s)\n",
 			 __FILE__,__LINE__, info->device_name );
 			 
-	cflag = info->tty->termios->c_cflag;
+	cflag = info->port.tty->termios->c_cflag;
 
 	/* if B0 rate (hangup) specified then negate DTR and RTS */
 	/* otherwise assert DTR and RTS */

@@ -1976,7 +1970,7 @@ static void mgsl_change_params(struct mgsl_struct *info)
 	 * current data rate.
 	 */
 	if (info->params.data_rate <= 460800)
-		info->params.data_rate = tty_get_baud_rate(info->tty);
+		info->params.data_rate = tty_get_baud_rate(info->port.tty);
 	
 	if ( info->params.data_rate ) {
 		info->timeout = (32*HZ*bits_per_char) / 

@@ -1985,31 +1979,31 @@ static void mgsl_change_params(struct mgsl_struct *info)
 	info->timeout += HZ/50;		/* Add .02 seconds of slop */
 
 	if (cflag & CRTSCTS)
-		info->flags |= ASYNC_CTS_FLOW;
+		info->port.flags |= ASYNC_CTS_FLOW;
 	else
-		info->flags &= ~ASYNC_CTS_FLOW;
+		info->port.flags &= ~ASYNC_CTS_FLOW;
 		
 	if (cflag & CLOCAL)
-		info->flags &= ~ASYNC_CHECK_CD;
+		info->port.flags &= ~ASYNC_CHECK_CD;
 	else
-		info->flags |= ASYNC_CHECK_CD;
+		info->port.flags |= ASYNC_CHECK_CD;
 
 	/* process tty input control flags */
 	
 	info->read_status_mask = RXSTATUS_OVERRUN;
-	if (I_INPCK(info->tty))
+	if (I_INPCK(info->port.tty))
 		info->read_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
- 	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+ 	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
  		info->read_status_mask |= RXSTATUS_BREAK_RECEIVED;
 	
-	if (I_IGNPAR(info->tty))
+	if (I_IGNPAR(info->port.tty))
 		info->ignore_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
-	if (I_IGNBRK(info->tty)) {
+	if (I_IGNBRK(info->port.tty)) {
 		info->ignore_status_mask |= RXSTATUS_BREAK_RECEIVED;
 		/* If ignoring parity and break indicators, ignore 
 		 * overruns too.  (For real raw support).
 		 */
-		if (I_IGNPAR(info->tty))
+		if (I_IGNPAR(info->port.tty))
 			info->ignore_status_mask |= RXSTATUS_OVERRUN;
 	}
 

@@ -3113,32 +3107,32 @@ static void mgsl_close(struct tty_struct *tty, struct file * filp)
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_close(%s) entry, count=%d\n",
-			 __FILE__,__LINE__, info->device_name, info->count);
+			 __FILE__,__LINE__, info->device_name, info->port.count);
 			 
-	if (!info->count)
+	if (!info->port.count)
 		return;
 
 	if (tty_hung_up_p(filp))
 		goto cleanup;
 			
-	if ((tty->count == 1) && (info->count != 1)) {
+	if ((tty->count == 1) && (info->port.count != 1)) {
 		/*
 		 * tty->count is 1 and the tty structure will be freed.
-		 * info->count should be one in this case.
+		 * info->port.count should be one in this case.
 		 * if it's not, correct it so that the port is shutdown.
 		 */
 		printk("mgsl_close: bad refcount; tty->count is 1, "
-		       "info->count is %d\n", info->count);
-		info->count = 1;
+		       "info->port.count is %d\n", info->port.count);
+		info->port.count = 1;
 	}
 	
-	info->count--;
+	info->port.count--;
 	
 	/* if at least one open remaining, leave hardware active */
-	if (info->count)
+	if (info->port.count)
 		goto cleanup;
 	
-	info->flags |= ASYNC_CLOSING;
+	info->port.flags |= ASYNC_CLOSING;
 	
 	/* set tty->closing to notify line discipline to 
 	 * only process XON/XOFF characters. Only the N_TTY

@@ -3155,7 +3149,7 @@ static void mgsl_close(struct tty_struct *tty, struct file * filp)
 		tty_wait_until_sent(tty, info->closing_wait);
 	}
 		
- 	if (info->flags & ASYNC_INITIALIZED)
+ 	if (info->port.flags & ASYNC_INITIALIZED)
  		mgsl_wait_until_sent(tty, info->timeout);
 
 	mgsl_flush_buffer(tty);

@@ -3165,23 +3159,23 @@ static void mgsl_close(struct tty_struct *tty, struct file * filp)
 	shutdown(info);
 	
 	tty->closing = 0;
-	info->tty = NULL;
+	info->port.tty = NULL;
 	
-	if (info->blocked_open) {
+	if (info->port.blocked_open) {
 		if (info->close_delay) {
 			msleep_interruptible(jiffies_to_msecs(info->close_delay));
 		}
-		wake_up_interruptible(&info->open_wait);
+		wake_up_interruptible(&info->port.open_wait);
 	}
 	
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
 			 
-	wake_up_interruptible(&info->close_wait);
+	wake_up_interruptible(&info->port.close_wait);
 	
 cleanup:			
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__,
-			tty->driver->name, info->count);
+			tty->driver->name, info->port.count);
 			
 }	/* end of mgsl_close() */
 

@@ -3211,7 +3205,7 @@ static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout)
 	if (mgsl_paranoia_check(info, tty->name, "mgsl_wait_until_sent"))
 		return;
 
-	if (!(info->flags & ASYNC_INITIALIZED))
+	if (!(info->port.flags & ASYNC_INITIALIZED))
 		goto exit;
 	 
 	orig_jiffies = jiffies;

@@ -3283,11 +3277,11 @@ static void mgsl_hangup(struct tty_struct *tty)
 	mgsl_flush_buffer(tty);
 	shutdown(info);
 	
-	info->count = 0;	
-	info->flags &= ~ASYNC_NORMAL_ACTIVE;
-	info->tty = NULL;
+	info->port.count = 0;	
+	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+	info->port.tty = NULL;
 
-	wake_up_interruptible(&info->open_wait);
+	wake_up_interruptible(&info->port.open_wait);
 	
 }	/* end of mgsl_hangup() */
 

@@ -3319,7 +3313,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 
 	if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
 		/* nonblock mode is set or port is not enabled */
-		info->flags |= ASYNC_NORMAL_ACTIVE;
+		info->port.flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 

@@ -3328,25 +3322,25 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 
 	/* Wait for carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->count is dropped by one, so that
+	 * this loop, info->port.count is dropped by one, so that
 	 * mgsl_close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 	 
 	retval = 0;
-	add_wait_queue(&info->open_wait, &wait);
+	add_wait_queue(&info->port.open_wait, &wait);
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):block_til_ready before block on %s count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->count );
+			 __FILE__,__LINE__, tty->driver->name, info->port.count );
 
 	spin_lock_irqsave(&info->irq_spinlock, flags);
 	if (!tty_hung_up_p(filp)) {
 		extra_count = true;
-		info->count--;
+		info->port.count--;
 	}
 	spin_unlock_irqrestore(&info->irq_spinlock, flags);
-	info->blocked_open++;
+	info->port.blocked_open++;
 	
 	while (1) {
 		if (tty->termios->c_cflag & CBAUD) {

@@ -3358,8 +3352,8 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 		
 		set_current_state(TASK_INTERRUPTIBLE);
 		
-		if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
-			retval = (info->flags & ASYNC_HUP_NOTIFY) ?
+		if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){
+			retval = (info->port.flags & ASYNC_HUP_NOTIFY) ?
 					-EAGAIN : -ERESTARTSYS;
 			break;
 		}

@@ -3368,7 +3362,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 	 	usc_get_serial_signals(info);
 		spin_unlock_irqrestore(&info->irq_spinlock,flags);
 		
- 		if (!(info->flags & ASYNC_CLOSING) &&
+ 		if (!(info->port.flags & ASYNC_CLOSING) &&
  		    (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
  			break;
 		}

@@ -3380,24 +3374,24 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 		
 		if (debug_level >= DEBUG_LEVEL_INFO)
 			printk("%s(%d):block_til_ready blocking on %s count=%d\n",
-				 __FILE__,__LINE__, tty->driver->name, info->count );
+				 __FILE__,__LINE__, tty->driver->name, info->port.count );
 				 
 		schedule();
 	}
 	
 	set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->open_wait, &wait);
+	remove_wait_queue(&info->port.open_wait, &wait);
 	
 	if (extra_count)
-		info->count++;
-	info->blocked_open--;
+		info->port.count++;
+	info->port.blocked_open--;
 	
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
-			 __FILE__,__LINE__, tty->driver->name, info->count );
+			 __FILE__,__LINE__, tty->driver->name, info->port.count );
 			 
 	if (!retval)
-		info->flags |= ASYNC_NORMAL_ACTIVE;
+		info->port.flags |= ASYNC_NORMAL_ACTIVE;
 		
 	return retval;
 	

@@ -3435,22 +3429,22 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp)
 		return -ENODEV;
 	
 	tty->driver_data = info;
-	info->tty = tty;
+	info->port.tty = tty;
 		
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgsl_open(%s), old ref count = %d\n",
-			 __FILE__,__LINE__,tty->driver->name, info->count);
+			 __FILE__,__LINE__,tty->driver->name, info->port.count);
 
 	/* If port is closing, signal caller to try again */
-	if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
-		if (info->flags & ASYNC_CLOSING)
-			interruptible_sleep_on(&info->close_wait);
-		retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
+	if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
+		if (info->port.flags & ASYNC_CLOSING)
+			interruptible_sleep_on(&info->port.close_wait);
+		retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
 			-EAGAIN : -ERESTARTSYS);
 		goto cleanup;
 	}
 	
-	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+	info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
 	spin_lock_irqsave(&info->netlock, flags);
 	if (info->netcount) {

@@ -3458,10 +3452,10 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp)
 		spin_unlock_irqrestore(&info->netlock, flags);
 		goto cleanup;
 	}
-	info->count++;
+	info->port.count++;
 	spin_unlock_irqrestore(&info->netlock, flags);
 
-	if (info->count == 1) {
+	if (info->port.count == 1) {
 		/* 1st open on this device, init hardware */
 		retval = startup(info);
 		if (retval < 0)

@@ -3484,9 +3478,9 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp)
 cleanup:			
 	if (retval) {
 		if (tty->count == 1)
-			info->tty = NULL; /* tty layer will release tty struct */
-		if(info->count)
-			info->count--;
+			info->port.tty = NULL; /* tty layer will release tty struct */
+		if(info->port.count)
+			info->port.count--;
 	}
 	
 	return retval;

@@ -4337,8 +4331,7 @@ static struct mgsl_struct* mgsl_allocate_device(void)
 		info->max_frame_size = 4096;
 		info->close_delay = 5*HZ/10;
 		info->closing_wait = 30*HZ;
-		init_waitqueue_head(&info->open_wait);
-		init_waitqueue_head(&info->close_wait);
+		tty_port_init(&info->port);
 		init_waitqueue_head(&info->status_event_wait_q);
 		init_waitqueue_head(&info->event_wait_q);
 		spin_lock_init(&info->irq_spinlock);

@@ -6575,7 +6568,7 @@ static bool mgsl_get_rx_frame(struct mgsl_struct *info)
 	unsigned int framesize = 0;
 	bool ReturnCode = false;
 	unsigned long flags;
-	struct tty_struct *tty = info->tty;
+	struct tty_struct *tty = info->port.tty;
 	bool return_frame = false;
 	
 	/*

@@ -6774,7 +6767,7 @@ static bool mgsl_get_raw_rx_frame(struct mgsl_struct *info)
 	unsigned int framesize = 0;
 	bool ReturnCode = false;
 	unsigned long flags;
-	struct tty_struct *tty = info->tty;
+	struct tty_struct *tty = info->port.tty;
 
 	/*
  	 * current_rx_buffer points to the 1st buffer of the next available

@@ -7711,7 +7704,7 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
 	unsigned short new_crctype;
 
 	/* return error if TTY interface open */
-	if (info->count)
+	if (info->port.count)
 		return -EBUSY;
 
 	switch (encoding)

@@ -7808,7 +7801,7 @@ static int hdlcdev_open(struct net_device *dev)
 
 	/* arbitrate between network and tty opens */
 	spin_lock_irqsave(&info->netlock, flags);
-	if (info->count != 0 || info->netcount != 0) {
+	if (info->port.count != 0 || info->netcount != 0) {
 		printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
 		spin_unlock_irqrestore(&info->netlock, flags);
 		return -EBUSY;

@@ -7894,7 +7887,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 		printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
 
 	/* return error if TTY interface open */
-	if (info->count)
+	if (info->port.count)
 		return -EBUSY;
 
 	if (cmd != SIOCWANDEV)

552 lines not on this page · raw message

569 lines not on this page · raw message

index 84840ba..2eaf09f 100644
@@ -128,9 +128,9 @@ static struct tty_driver *esp_driver;
 
 #if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
 #define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
-				tty->name, info->flags, \
+				tty->name, info->port.flags, \
 				serial_driver.refcount, \
-				info->count, tty->count, s)
+				info->port.count, tty->count, s)
 #else
 #define DBG_CNT(s)
 #endif

@@ -172,13 +172,13 @@ static inline int serial_paranoia_check(struct esp_struct *info,
 
 static inline unsigned int serial_in(struct esp_struct *info, int offset)
 {
-	return inb(info->port + offset);
+	return inb(info->io_port + offset);
 }
 
 static inline void serial_out(struct esp_struct *info, int offset,
 			      unsigned char value)
 {
-	outb(value, info->port+offset);
+	outb(value, info->io_port+offset);
 }
 
 /*

@@ -273,7 +273,7 @@ static inline void release_pio_buffer(struct esp_pio_buffer *buf)
 
 static inline void receive_chars_pio(struct esp_struct *info, int num_bytes)
 {
-	struct tty_struct *tty = info->tty;
+	struct tty_struct *tty = info->port.tty;
 	int i;
 	struct esp_pio_buffer *pio_buf;
 	struct esp_pio_buffer *err_buf;

@@ -295,7 +295,7 @@ static inline void receive_chars_pio(struct esp_struct *info, int num_bytes)
 
 	for (i = 0; i < num_bytes - 1; i += 2) {
 		*((unsigned short *)(pio_buf->data + i)) =
-			inw(info->port + UART_ESI_RX);
+			inw(info->io_port + UART_ESI_RX);
 		err_buf->data[i] = serial_in(info, UART_ESI_RWS);
 		err_buf->data[i + 1] = (err_buf->data[i] >> 3) & status_mask;
 		err_buf->data[i] &= status_mask;

@@ -308,7 +308,7 @@ static inline void receive_chars_pio(struct esp_struct *info, int num_bytes)
 	}
 
 	/* make sure everything is still ok since interrupts were enabled */
-	tty = info->tty;
+	tty = info->port.tty;
 
 	if (!tty) {
 		release_pio_buffer(pio_buf);

@@ -325,7 +325,7 @@ static inline void receive_chars_pio(struct esp_struct *info, int num_bytes)
 
 			if (err_buf->data[i] & 0x04) {
 				flag = TTY_BREAK;
-				if (info->flags & ASYNC_SAK)
+				if (info->port.flags & ASYNC_SAK)
 					do_SAK(tty);
 			} else if (err_buf->data[i] & 0x02)
 				flag = TTY_FRAME;

@@ -370,7 +370,7 @@ static void receive_chars_dma(struct esp_struct *info, int num_bytes)
 static inline void receive_chars_dma_done(struct esp_struct *info,
 					    int status)
 {
-	struct tty_struct *tty = info->tty;
+	struct tty_struct *tty = info->port.tty;
 	int num_bytes;
 	unsigned long flags;
 

@@ -396,7 +396,7 @@ static inline void receive_chars_dma_done(struct esp_struct *info,
 			if (status & 0x10) {
 				statflag = TTY_BREAK;
 				(info->icount.brk)++;
-				if (info->flags & ASYNC_SAK)
+				if (info->port.flags & ASYNC_SAK)
 					do_SAK(tty);
 			} else if (status & 0x08) {
 				statflag = TTY_FRAME;

@@ -451,7 +451,7 @@ static inline void transmit_chars_pio(struct esp_struct *info,
 
 		for (i = 0; i < space_avail - 1; i += 2) {
 			outw(*((unsigned short *)(pio_buf->data + i)),
-			     info->port + UART_ESI_TX);
+			     info->io_port + UART_ESI_TX);
 		}
 
 		if (space_avail & 0x0001)

@@ -470,8 +470,8 @@ static inline void transmit_chars_pio(struct esp_struct *info,
 	}
 
 	if (info->xmit_cnt < WAKEUP_CHARS) {
-		if (info->tty)
-			tty_wakeup(info->tty);
+		if (info->port.tty)
+			tty_wakeup(info->port.tty);
 
 #ifdef SERIAL_DEBUG_INTR
 		printk("THRE...");