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

Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
git-mirror · Jun 16, 2009 · 52856ed · 52856ed
1 parent 8d2ead7
commit 52856ed
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c
@@ -793,6 +793,8 @@ void tty_ldisc_hangup(struct tty_struct *tty)
 		/* Avoid racing set_ldisc */
 		mutex_lock(&tty->ldisc_mutex);
 		/* Switch back to N_TTY */
+		tty_ldisc_halt(tty);
+		tty_ldisc_wait_idle(tty);
 		tty_ldisc_reinit(tty);
 		/* At this point we have a closed ldisc and we want to
 		   reopen it. We could defer this to the next open but