diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index 35eb3040..33d37d2 100644
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -294,7 +294,9 @@
 			retval = -ERESTARTSYS;
 			break;
 		}
+		tty_unlock();
 		schedule();
+		tty_lock();
 	}
 	finish_wait(&port->open_wait, &wait);