diff --git a/drivers/md/md.c b/drivers/md/md.c
index ff9fef3..32b2ad8 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2594,15 +2594,20 @@
 			err = do_md_stop(mddev, 1);
 		else {
 			mddev->ro = 1;
+			set_disk_ro(mddev->gendisk, 1);
 			err = do_md_run(mddev);
 		}
 		break;
 	case read_auto:
-		/* stopping an active array */
 		if (mddev->pers) {
-			err = do_md_stop(mddev, 1);
-			if (err == 0)
-				mddev->ro = 2; /* FIXME mark devices writable */
+			if (mddev->ro != 1)
+				err = do_md_stop(mddev, 1);
+			else
+				err = restart_array(mddev);
+			if (err == 0) {
+				mddev->ro = 2;
+				set_disk_ro(mddev->gendisk, 0);
+			}
 		} else {
 			mddev->ro = 2;
 			err = do_md_run(mddev);
@@ -2640,6 +2645,7 @@
 			err = 0;
 		} else {
 			mddev->ro = 0;
+			set_disk_ro(mddev->gendisk, 0);
 			err = do_md_run(mddev);
 		}
 		break;