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md: revert change to raid_disks on failure. 

If we try to update_raid_disks and it fails, we should put
'delta_disks' back to zero.  This is important because some code,
such as slot_store, assumes that delta_disks has been validated.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2011-01-31 11:57:42 +11:00
parent 1f0324caef
commit de171cb9a5
1 changed files with 2 additions and 0 deletions
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2
drivers/md/md.c
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@ -5578,6 +5578,8 @@ static int update_raid_disks(mddev_t *mddev, int raid_disks)
mddev->delta_disks = raid_disks - mddev->raid_disks;
rv = mddev->pers->check_reshape(mddev);
if (rv < 0)
mddev->delta_disks = 0;
return rv;
}