riscom/rocket: switch to int put_char method

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/riscom8.c linux-2.6.25-rc8-mm2/drivers/char/riscom8.c
@@ -1161,16 +1161,17 @@
 	return total;
 }
 
-static void rc_put_char(struct tty_struct * tty, unsigned char ch)
+static int rc_put_char(struct tty_struct * tty, unsigned char ch)
 {
 	struct riscom_port *port = (struct riscom_port *)tty->driver_data;
 	unsigned long flags;
+	int ret = 0;
 
 	if (rc_paranoia_check(port, tty->name, "rc_put_char"))
-		return;
+		return 0;
 
 	if (!tty || !port->xmit_buf)
-		return;
+		return 0;
 
 	spin_lock_irqsave(&riscom_lock, flags);
 	

@@ -1180,9 +1181,11 @@
 	port->xmit_buf[port->xmit_head++] = ch;
 	port->xmit_head &= SERIAL_XMIT_SIZE - 1;
 	port->xmit_cnt++;
+	ret = 1;
 
 out:
 	spin_unlock_irqrestore(&riscom_lock, flags);
+	return ret;
 }
 
 static void rc_flush_chars(struct tty_struct * tty)

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc8-mm2/drivers/char/rocket.c linux-2.6.25-rc8-mm2/drivers/char/rocket.c
@@ -1663,14 +1663,14 @@
  *  writing routines will write directly to transmit FIFO.
  *  Write buffer and counters protected by spinlocks
  */
-static void rp_put_char(struct tty_struct *tty, unsigned char ch)
+static int rp_put_char(struct tty_struct *tty, unsigned char ch)
 {
 	struct r_port *info = (struct r_port *) tty->driver_data;
 	CHANNEL_t *cp;
 	unsigned long flags;
 
 	if (rocket_paranoia_check(info, "rp_put_char"))
-		return;
+		return 0;
 
 	/*
 	 * Grab the port write mutex, locking out other processes that try to

@@ -1699,6 +1699,7 @@
 	}
 	spin_unlock_irqrestore(&info->slock, flags);
 	mutex_unlock(&info->write_mtx);
+	return 1;
 }
 
 /*