1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index 1bdd2bf4f37d..e02d59245a17 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -62,7 +62,7 @@ void tty_wait_until_sent(struct tty_struct * tty, long timeout)
         if (!timeout)
                 timeout = MAX_SCHEDULE_TIMEOUT;
         if (wait_event_interruptible_timeout(tty->write_wait,
-                        !tty->driver->chars_in_buffer(tty), timeout))
+                        !tty->driver->chars_in_buffer(tty), timeout) < 0)
                 return;
         if (tty->driver->wait_until_sent)
                 tty->driver->wait_until_sent(tty, timeout);