diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index 56b92db944aeb722f55db02e0ea74471caef8ec2..4cee060a292dff406d93c724da85a9e07f1a74ec 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -134,7 +134,8 @@ struct request *blk_mq_sched_get_request(struct request_queue *q,
 			rq = __blk_mq_alloc_request(data, op);
 	} else {
 		rq = __blk_mq_alloc_request(data, op);
-		data->hctx->tags->rqs[rq->tag] = rq;
+		if (rq)
+			data->hctx->tags->rqs[rq->tag] = rq;
 	}
 
 	if (rq) {