From e460fa8bdc1f744a92dd20a968ac652c6cacaf89 Mon Sep 17 00:00:00 2001 From: Neil Brown Date: Wed, 30 Sep 2015 13:11:22 +1000 Subject: 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") Signed-off-by: Jiri Slaby --- drivers/md/md.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 1c512dc1f17f..81bf511b3182 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5315,6 +5315,8 @@ EXPORT_SYMBOL_GPL(md_stop_writes); static void __md_stop(struct mddev *mddev) { mddev->ready = 0; + /* Ensure ->event_work is done */ + flush_workqueue(md_misc_wq); mddev->pers->stop(mddev); if (mddev->pers->sync_request && mddev->to_remove == NULL) mddev->to_remove = &md_redundancy_group; -- cgit v1.2.3