diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 047bb42c282b..d1895bc60fcf 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1577,6 +1577,8 @@ int blkcg_activate_policy(struct gendisk *disk, const struct blkcg_policy *pol)
 
 		if (blkg->pd[pol->plid])
 			continue;
+		if (hlist_unhashed(&blkg->blkcg_node))
+			continue;
 
 		/* If prealloc matches, use it; otherwise try GFP_NOWAIT */
 		if (blkg == pinned_blkg) {