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[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>
This commit is contained in:
NeilBrown 2007-03-26 21:32:14 -08:00 committed by Linus Torvalds
parent 3d37890baa
commit 041ae52e26
2 changed files with 3 additions and 1 deletions
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1
drivers/md/md.c
View File

@ -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);

3
drivers/md/raid5.c
View File

@ -3646,8 +3646,8 @@ static int run(mddev_t *mddev)
mddev->queue->unplug_fn = raid5_unplug_device;
mddev->queue->issue_flush_fn = raid5_issue_flush;
mddev->queue->backing_dev_info.congested_fn = raid5_congested;
mddev->queue->backing_dev_info.congested_data = mddev;
mddev->queue->backing_dev_info.congested_fn = raid5_congested;
mddev->array_size = mddev->size * (conf->previous_raid_disks -
conf->max_degraded);
@ -3678,6 +3678,7 @@ static int stop(mddev_t *mddev)
mddev->thread = NULL;
shrink_stripes(conf);
kfree(conf->stripe_hashtbl);
mddev->queue->backing_dev_info.congested_fn = NULL;
blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/
sysfs_remove_group(&mddev->kobj, &raid5_attrs_group);
kfree(conf->disks);