diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index abc93a9..19105ec 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -147,10 +147,8 @@
 
 static void check_unthrottle(struct tty_struct *tty)
 {
-	if (tty->count &&
-	    test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
-	    tty->ops->unthrottle)
-		tty->ops->unthrottle(tty);
+	if (tty->count)
+		tty_unthrottle(tty);
 }
 
 /**
@@ -982,12 +980,8 @@
 	 * mode.  We don't want to throttle the driver if we're in
 	 * canonical mode and don't have a newline yet!
 	 */
-	if (tty->receive_room < TTY_THRESHOLD_THROTTLE) {
-		/* check TTY_THROTTLED first so it indicates our state */
-		if (!test_and_set_bit(TTY_THROTTLED, &tty->flags) &&
-		    tty->ops->throttle)
-			tty->ops->throttle(tty);
-	}
+	if (tty->receive_room < TTY_THRESHOLD_THROTTLE)
+		tty_throttle(tty);
 }
 
 int is_ignored(int sig)