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>
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@ -5578,6 +5578,8 @@ static int update_raid_disks(mddev_t *mddev, int raid_disks)
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mddev->delta_disks = raid_disks - mddev->raid_disks;
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mddev->delta_disks = raid_disks - mddev->raid_disks;
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rv = mddev->pers->check_reshape(mddev);
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rv = mddev->pers->check_reshape(mddev);
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if (rv < 0)
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mddev->delta_disks = 0;
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return rv;
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return rv;
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}
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}
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