[PATCH 5/6] tty: Fix hangup race with TIOCSETD ioctl
From: Peter Hurley <hidden>
Date: 2013-06-15 11:05:53
Also in:
lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
The hangup may already have happened; check for that state also. Signed-off-by: Peter Hurley <redacted> --- drivers/tty/tty_ldisc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 6c63b73..08b8a1b 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c@@ -546,10 +546,8 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) 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);
--
1.8.1.2