tty: Fix hangup race with TIOCSETD ioctl
The hangup may already have happened; check for that state also.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 31bd45a..5819667 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -546,10 +546,8 @@
old_ldisc = tty->ldisc;
tty_lock(tty);
- /* FIXME: for testing only */
- WARN_ON(test_bit(TTY_HUPPED, &tty->flags));
-
- if (test_bit(TTY_HUPPING, &tty->flags)) {
+ if (test_bit(TTY_HUPPING, &tty->flags) ||
+ test_bit(TTY_HUPPED, &tty->flags)) {
/* We were raced by the hangup method. It will have stomped
the ldisc data and closed the ldisc down */
tty_ldisc_enable_pair(tty, o_tty);