md: don't update metadata when stopping a read-only array.
read-only arrays should stay that way as much as possible.
Updating the metadata - which could be triggered by a re-add
while assembling the array metadata - should be avoided.
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 491afda..3013228 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5293,7 +5293,8 @@
bitmap_flush(mddev);
md_super_wait(mddev);
- if (!mddev->in_sync || mddev->flags) {
+ if (mddev->ro == 0 &&
+ (!mddev->in_sync || mddev->flags)) {
/* mark array as shutdown cleanly */
mddev->in_sync = 1;
md_update_sb(mddev, 1);