diff options
| -rw-r--r-- | drivers/md/raid5.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 66cd47973398..96c690279fc6 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -5526,8 +5526,13 @@ static int raid5_start_reshape(mddev_t *mddev) /* Add some new drives, as many as will fit. * We know there are enough to make the newly sized array work. + * Don't add devices if we are reducing the number of + * devices in the array. This is because it is not possible + * to correctly record the "partially reconstructed" state of + * such devices during the reshape and confusion could result. */ - list_for_each_entry(rdev, &mddev->disks, same_set) + if (mddev->delta_disks >= 0) + list_for_each_entry(rdev, &mddev->disks, same_set) if (rdev->raid_disk < 0 && !test_bit(Faulty, &rdev->flags)) { if (raid5_add_disk(mddev, rdev) == 0) { @@ -5549,7 +5554,7 @@ static int raid5_start_reshape(mddev_t *mddev) } /* When a reshape changes the number of devices, ->degraded - * is measured against the large of the pre and post number of + * is measured against the larger of the pre and post number of * devices.*/ if (mddev->delta_disks > 0) { spin_lock_irqsave(&conf->device_lock, flags); |