From 66dcd4a1eeb3526f42d6fb910a17e02da97c29a2 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Wed, 22 Jul 2015 10:20:07 +1000 Subject: [PATCH] md: flush ->event_work before stopping array. commit ee5d004fd0591536a061451eba2b187092e9127c upstream. The 'event_work' worker used by dm-raid may still be running when the array is stopped. This can result in an oops. So flush the workqueue on which it is run after detaching and before destroying the device. Reported-by: Heinz Mauelshagen Signed-off-by: NeilBrown Fixes: 9d09e663d550 ("dm: raid456 basic support") [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques --- drivers/md/md.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index b6eddaf97541a..9fc6c5de06386 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5264,6 +5264,8 @@ EXPORT_SYMBOL_GPL(md_stop_writes); static void __md_stop(struct mddev *mddev) { + /* Ensure ->event_work is done */ + flush_workqueue(md_misc_wq); mddev->ready = 0; mddev->pers->stop(mddev); if (mddev->pers->sync_request && mddev->to_remove == NULL) -- 2.47.3