1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index b6d16022a53e..8dbab2ef3885 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)