diff --git a/block/blk-mq.c b/block/blk-mq.c
index c763f0bc6637..b9f454613989 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2735,7 +2735,12 @@ static void blk_mq_dispatch_plug_list(struct blk_plug *plug, bool from_sched)
 
 	percpu_ref_get(&this_hctx->queue->q_usage_counter);
 	/* passthrough requests should never be issued to the I/O scheduler */
-	if (this_hctx->queue->elevator && !is_passthrough) {
+	if (is_passthrough) {
+		spin_lock(&this_hctx->lock);
+		list_splice_tail_init(&list, &this_hctx->dispatch);
+		spin_unlock(&this_hctx->lock);
+		blk_mq_run_hw_queue(this_hctx, from_sched);
+	} else if (this_hctx->queue->elevator) {
 		this_hctx->queue->elevator->type->ops.insert_requests(this_hctx,
 				&list, 0);
 		blk_mq_run_hw_queue(this_hctx, from_sched);