diff --git a/[refs] b/[refs]
index d477e28d86a9..e4e87656b4ac 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4ac5d7050e4e4d63751e78fb152a274d05c08563
+refs/heads/master: dc6802a771e91050fb686dfeeb9de4c6c9cadb79
diff --git a/trunk/drivers/tty/tty_io.c b/trunk/drivers/tty/tty_io.c
index 608749978df4..6784aae210e3 100644
--- a/trunk/drivers/tty/tty_io.c
+++ b/trunk/drivers/tty/tty_io.c
@@ -181,6 +181,8 @@ struct tty_struct *alloc_tty_struct(void)
 
 void free_tty_struct(struct tty_struct *tty)
 {
+	if (!tty)
+		return;
 	if (tty->dev)
 		put_device(tty->dev);
 	kfree(tty->write_buf);