diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index a408c8e487ec006147078f2f7d22b6bce88925bb..6f4c7d0a53bf36bc6ff28afeadca4720704e459f 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -1057,7 +1057,7 @@ int tty_perform_flush(struct tty_struct *tty, unsigned long arg)
 	if (retval)
 		return retval;
 
-	ld = tty_ldisc_ref(tty);
+	ld = tty_ldisc_ref_wait(tty);
 	switch (arg) {
 	case TCIFLUSH:
 		if (ld && ld->ops->flush_buffer)