nvme-tcp: pair send_mutex init with destroy

Each mutex_init() should have a corresponding mutex_destroy().

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/tcp.c

@@ -1220,6 +1220,7 @@ static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
 
 	sock_release(queue->sock);
 	kfree(queue->pdu);
+	mutex_destroy(&queue->send_mutex);
 	mutex_destroy(&queue->queue_lock);
 }
 
@@ -1525,6 +1526,7 @@ err_sock:
 	sock_release(queue->sock);
 	queue->sock = NULL;
 err_destroy_mutex:
+	mutex_destroy(&queue->send_mutex);
 	mutex_destroy(&queue->queue_lock);
 	return ret;
 }