2 files changed, 4 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++;
         }
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 85a068bab625..7bb6d1abf71e 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -83,6 +83,7 @@ struct mdk_rdev_s
 #define BarriersNotsupp 5               /* BIO_RW_BARRIER is not supported */
 #define AllReserved     6               /* If whole device is reserved for
                                          * one array */
+#define AutoDetected    7               /* added by auto-detect */
 
         int desc_nr;                    /* descriptor index in the superblock */
         int raid_disk;                  /* role of device in array */