diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index c222a56..0f74945 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2249,12 +2249,12 @@
 	n_tty_set_room(tty);
 	up_read(&tty->termios_rwsem);
 
-	mutex_unlock(&ldata->atomic_read_lock);
 	remove_wait_queue(&tty->read_wait, &wait);
-
 	if (!waitqueue_active(&tty->read_wait))
 		ldata->minimum_to_wake = minimum;
 
+	mutex_unlock(&ldata->atomic_read_lock);
+
 	__set_current_state(TASK_RUNNING);
 	if (b - buf)
 		retval = b - buf;