serial/68360serial: replace

@@ -1411,7 +1411,7 @@ static void end_break(ser_info_t *info)
  */
 static void send_break(ser_info_t *info, int duration)
 {
-	current->state = TASK_INTERRUPTIBLE;
+	set_current_state(TASK_INTERRUPTIBLE);
 #ifdef SERIAL_DEBUG_SEND_BREAK
 	printk("rs_send_break(%d) jiff=%lu...", duration, jiffies);
 #endif

@@ -1723,8 +1723,7 @@ static void rs_360_close(struct tty_stru
 	info->tty = 0;
 	if (info->blocked_open) {
 		if (info->close_delay) {
-			current->state = TASK_INTERRUPTIBLE;
-			schedule_timeout(info->close_delay);
+			msleep_interruptible(jiffies_to_msecs(info->close_delay));
 		}
 		wake_up_interruptible(&info->open_wait);
 	}

@@ -1777,9 +1776,8 @@ static void rs_360_wait_until_sent(struc
 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
 		printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
 #endif
-		current->state = TASK_INTERRUPTIBLE;
 /*		current->counter = 0;	 make us low-priority */
-		schedule_timeout(char_time);
+		msleep_interruptible(jiffies_to_msecs(char_time));
 		if (signal_pending(current))
 			break;
 		if (timeout && ((orig_jiffies + timeout) < jiffies))