md/raid10: fix refounct imbalance when resyncing an array with a replacement device.

If you have a raid10 with a replacement device that is resyncing -
e.g. after a crash before the replacement was complete - the write to
the replacement will increment nr_pending on the wrong device, which
will lead to strangeness.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
NeilBrown 2016-06-02 16:19:52 +10:00 committed by Shaohua Li
parent 414e6b9a70
commit 83f1261f5e

View File

@ -3229,7 +3229,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
bio->bi_error = -EIO; bio->bi_error = -EIO;
sector = r10_bio->devs[i].addr; sector = r10_bio->devs[i].addr;
atomic_inc(&conf->mirrors[d].rdev->nr_pending); atomic_inc(&conf->mirrors[d].replacement->nr_pending);
bio->bi_next = biolist; bio->bi_next = biolist;
biolist = bio; biolist = bio;
bio->bi_private = r10_bio; bio->bi_private = r10_bio;