diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index e96a00fe13891b6f5f9fae1b2e1e6f1054d37956..2bdb0144a22e3f0b4d8675826bdd0ea353ac3079 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -1151,7 +1151,6 @@ static int copy_from_read_buf(struct tty_struct *tty,
 	n = min(*nr, n);
 	spin_unlock_irqrestore(&tty->read_lock, flags);
 	if (n) {
-		mb();
 		retval = copy_to_user(*b, &tty->read_buf[tty->read_tail], n);
 		n -= retval;
 		spin_lock_irqsave(&tty->read_lock, flags);