Commit d7b00aad authored by NeilBrown's avatar NeilBrown Committed by Greg Kroah-Hartman

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: default avatarHeinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: default avatarNeilBrown <neilb@suse.com>
Fixes: 9d09e663 ("dm: raid456 basic support")
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1335a48a
......@@ -5306,6 +5306,8 @@ 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;
......
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