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 3930b3e9aa0..5694eb8941b 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -4169,8 +4169,13 @@ raid5_size(mddev_t *mddev, sector_t sectors, int raid_disks) if (!sectors) sectors = mddev->dev_sectors; - if (!raid_disks) - raid_disks = conf->previous_raid_disks; + if (!raid_disks) { + /* size is defined by the smallest of previous and new size */ + if (conf->raid_disks < conf->previous_raid_disks) + raid_disks = conf->raid_disks; + else + raid_disks = conf->previous_raid_disks; + } sectors &= ~((sector_t)mddev->chunk_size/512 - 1); return sectors * (raid_disks - conf->max_degraded); |