Merge branch 'from-linus' into upstream

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index b6d16022a53..8dbab2ef388 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1597,6 +1597,19 @@ void md_update_sb(mddev_t * mddev)
 
 repeat:
 	spin_lock_irq(&mddev->write_lock);
+
+	if (mddev->degraded && mddev->sb_dirty == 3)
+		/* If the array is degraded, then skipping spares is both
+		 * dangerous and fairly pointless.
+		 * Dangerous because a device that was removed from the array
+		 * might have a event_count that still looks up-to-date,
+		 * so it can be re-added without a resync.
+		 * Pointless because if there are any spares to skip,
+		 * then a recovery will happen and soon that array won't
+		 * be degraded any more and the spare can go back to sleep then.
+		 */
+		mddev->sb_dirty = 1;
+
 	sync_req = mddev->in_sync;
 	mddev->utime = get_seconds();
 	if (mddev->sb_dirty == 3)