diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 7710a6a77d97..bf5a00145c0b 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -933,13 +933,6 @@ restart:
 	if (ld == NULL)
 		return -EINVAL;
 
-	/*
-	 *	No more input please, we are switching. The new ldisc
-	 *	will update this value in the ldisc open function
-	 */
-
-	tty->receive_room = 0;
-
 	/*
 	 *	Problem: What do we do if this blocks ?
 	 */
@@ -951,6 +944,13 @@ restart:
 		return 0;
 	}
 
+	/*
+	 *	No more input please, we are switching. The new ldisc
+	 *	will update this value in the ldisc open function
+	 */
+
+	tty->receive_room = 0;
+
 	o_ldisc = tty->ldisc;
 	o_tty = tty->link;