[PATCH] md: clear the congested_fn when stopping a raid5

If this mddev and queue got reused for another array that doesn't register a
congested_fn, this function would get called incorretly.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 6c06e825cff5..a9852dbdfd66 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3325,6 +3325,7 @@ static int do_md_stop(mddev_t * mddev, int mode)
                         mddev->queue->merge_bvec_fn = NULL;
                         mddev->queue->unplug_fn = NULL;
                         mddev->queue->issue_flush_fn = NULL;
+                        mddev->queue->backing_dev_info.congested_fn = NULL;
                         if (mddev->pers->sync_request)
                                 sysfs_remove_group(&mddev->kobj, &md_redundancy_group);