[PATCH] md: clean out unplug and other queue function on md shutdown

The mddev and queue might be used for another array which does not set these,
so they need to be cleared.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index c8c40c361532..b5744b1bd2ba 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3322,6 +3322,9 @@ static int do_md_stop(mddev_t * mddev, int mode)
                                 set_disk_ro(disk, 0);
                         blk_queue_make_request(mddev->queue, md_fail_request);
                         mddev->pers->stop(mddev);
+                        mddev->queue->merge_bvec_fn = NULL;
+                        mddev->queue->unplug_fn = NULL;
+                        mddev->queue->issue_flush_fn = NULL;
                         if (mddev->pers->sync_request)
                                 sysfs_remove_group(&mddev->kobj, &md_redundancy_group);