[PATCH] md: tidy up device-change notification when an md array is stopped

An md array can be stopped leaving all the setting still in place, or it can
torn down and destroyed.  set_capacity and other change notifications only
happen in the latter case, but should happen in both.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/md/md.c

@@ -3314,6 +3314,10 @@ static int do_md_stop(mddev_t * mddev, int mode)
 
 			module_put(mddev->pers->owner);
 			mddev->pers = NULL;
+
+			set_capacity(disk, 0);
+			mddev->changed = 1;
+
 			if (mddev->ro)
 				mddev->ro = 0;
 		}
@@ -3333,7 +3337,7 @@ static int do_md_stop(mddev_t * mddev, int mode)
 	if (mode == 0) {
 		mdk_rdev_t *rdev;
 		struct list_head *tmp;
-		struct gendisk *disk;
+
 		printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
 
 		bitmap_destroy(mddev);
@@ -3358,10 +3362,6 @@ static int do_md_stop(mddev_t * mddev, int mode)
 		mddev->raid_disks = 0;
 		mddev->recovery_cp = 0;
 
-		disk = mddev->gendisk;
-		if (disk)
-			set_capacity(disk, 0);
-		mddev->changed = 1;
 	} else if (mddev->pers)
 		printk(KERN_INFO "md: %s switched to read-only mode.\n",
 			mdname(mddev));