nvme-tcp: fix possible leakage during error flow

During nvme_tcp_setup_cmd_pdu error flow, one must call nvme_cleanup_cmd
since it's symmetric to nvme_setup_cmd.
Signed-off-by: NMax Gurtovoy <maxg@mellanox.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKeith Busch <kbusch@kernel.org>

drivers/nvme/host/tcp.c

@@ -2136,6 +2136,7 @@ static blk_status_t nvme_tcp_setup_cmd_pdu(struct nvme_ns *ns,
 
 	ret = nvme_tcp_map_data(queue, rq);
 	if (unlikely(ret)) {
+		nvme_cleanup_cmd(rq);
 		dev_err(queue->ctrl->ctrl.device,
 			"Failed to map data (%d)\n", ret);
 		return ret;