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-rw-r--r--drivers/md/md.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 249b2896d4e..52c988b072d 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1399,8 +1399,14 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev)
if (rdev2->desc_nr+1 > max_dev)
max_dev = rdev2->desc_nr+1;
- if (max_dev > le32_to_cpu(sb->max_dev))
+ if (max_dev > le32_to_cpu(sb->max_dev)) {
+ int bmask;
sb->max_dev = cpu_to_le32(max_dev);
+ rdev->sb_size = max_dev * 2 + 256;
+ bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1;
+ if (rdev->sb_size & bmask)
+ rdev->sb_size = (rdev->sb_size | bmask) + 1;
+ }
for (i=0; i<max_dev;i++)
sb->dev_roles[i] = cpu_to_le16(0xfffe);