From: Sagi Grimberg <sagi@grimberg.me>
Date: Wed, 16 Jun 2021 14:19:35 -0700
Subject: nvme-tcp: don't check blk_mq_tag_to_rq when receiving pdu data
Patch-mainline: v5.15-rc1
Git-commit: 3b01a9d0caa8276d9ce314e09610f7fb70f49a00
References: bsc#1181972 stable-5.14.6

We already validate it when receiving the c2hdata pdu header
and this is not changing so this is a redundant check.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/tcp.c |   14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -690,17 +690,9 @@ static int nvme_tcp_recv_data(struct nvm
 			      unsigned int *offset, size_t *len)
 {
 	struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu;
-	struct nvme_tcp_request *req;
-	struct request *rq;
-
-	rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id);
-	if (!rq) {
-		dev_err(queue->ctrl->ctrl.device,
-			"queue %d tag %#x not found\n",
-			nvme_tcp_queue_id(queue), pdu->command_id);
-		return -ENOENT;
-	}
-	req = blk_mq_rq_to_pdu(rq);
+	struct request *rq =
+		blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id);
+	struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq);
 
 	while (true) {
 		int recv_len, ret;