diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 54c8677..5fe39c2 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -257,6 +257,7 @@
 	rcu_assign_pointer(mddev->private, newconf);
 	md_set_array_sectors(mddev, linear_size(mddev, 0, 0));
 	set_capacity(mddev->gendisk, mddev->array_sectors);
+	revalidate_disk(mddev->gendisk);
 	call_rcu(&oldconf->rcu, free_conf);
 	return 0;
 }