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authorNeilBrown <neilb@suse.com>2015-07-22 10:20:07 +1000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-22 14:37:52 -0700
commitd7b00aadea64b68ef9025c6622a78a7b703b47e1 (patch)
tree6f99df3f50dc68b97b83f71a196851763c0fb05d
parent1335a48ac221194597294b5012aaca14484da0ad (diff)
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 <heinzm@redhat.com> Signed-off-by: NeilBrown <neilb@suse.com> Fixes: 9d09e663d550 ("dm: raid456 basic support") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-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 37ff00d014b4..7c45286e2662 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -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;