[PATCH -next 1/9] tty: WARN if buffer work racing with tty free

From: Peter Hurley
Date: Tue Dec 04 2012 - 02:08:35 EST



Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
---
drivers/tty/tty_io.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 78c3000..3d2b6d7 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1511,6 +1511,8 @@ static void queue_release_one_tty(struct kref *kref)
{
struct tty_struct *tty = container_of(kref, struct tty_struct, kref);

+ WARN_ON(work_pending(&tty->port->buf.work));
+
/* The hangup queue is now free so we can reuse it rather than
waste a chunk of memory for each port */
INIT_WORK(&tty->hangup_work, release_one_tty);
--
1.8.0

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