md: clean up irregularity with raid autodetect

When a raid1 array is stopped, all components currently get added to the list
for auto-detection.  However we should really only add components that were
found by autodetection in the first place.  So add a flag to record that
information, and use it.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index b375de5c1af2..a71241c5ae72 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1503,7 +1503,8 @@ static void export_rdev(mdk_rdev_t * rdev)
         free_disk_sb(rdev);
         list_del_init(&rdev->same_set);
 #ifndef MODULE
-        md_autodetect_dev(rdev->bdev->bd_dev);
+        if (test_bit(AutoDetected, &rdev->flags))
+                md_autodetect_dev(rdev->bdev->bd_dev);
 #endif
         unlock_rdev(rdev);
         kobject_put(&rdev->kobj);
@@ -6025,6 +6026,7 @@ static void autostart_arrays(int part)
                         MD_BUG();
                         continue;
                 }
+                set_bit(AutoDetected, &rdev->flags);
                 list_add(&rdev->same_set, &pending_raid_disks);
                 i_passed++;
         }