[PATCH] ldisc: Make sure the ldisc isn't active when we close it

From: Alan Cox
Date: Mon Jun 15 2009 - 11:32:12 EST

Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
LKML-Reference: <20090615153206.4036.26148.stgit@xxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
drivers/char/tty_ldisc.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c
index 69b912d..0ea4f63 100644
--- a/drivers/char/tty_ldisc.c
+++ b/drivers/char/tty_ldisc.c
@@ -792,6 +792,8 @@ void tty_ldisc_hangup(struct tty_struct *tty)
/* Avoid racing set_ldisc */
/* Switch back to N_TTY */
+ tty_ldisc_halt(tty);
+ tty_ldisc_wait_idle(tty);
/* At this point we have a closed ldisc and we want to
reopen it. We could defer this to the next open but
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