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authorNeilBrown <neilb@suse.com>2015-07-22 10:20:07 +1000
committerSasha Levin <sasha.levin@oracle.com>2015-10-27 22:14:57 -0400
commit3e6fba2fc343ef5d80f751b699a4688a2f57f861 (patch)
treeb9342ca06fd03a080fa61db9979ebe428edc4e56
parenta70046a8f849fb1a98c5aee0c3504ddf61461eab (diff)
downloadlinux-linaro-stable-3e6fba2fc343ef5d80f751b699a4688a2f57f861.tar.gz
md: flush ->event_work before stopping array.
[ Upstream commit ee5d004fd0591536a061451eba2b187092e9127c ] 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 <heinzm@redhat.com> Signed-off-by: NeilBrown <neilb@suse.com> Cc: stable@vger.kernel.org (2.6.38+ please delay 2 weeks after -final release) Fixes: 9d09e663d550 ("dm: raid456 basic support") Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
-rw-r--r--drivers/md/md.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index dd7a3701b99c..9c5d53f3e4c6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5073,6 +5073,8 @@ 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;