nvmet-tcp: make nvmet_tcp_alloc_queue() a void function

The return value from nvmet_tcp_alloc_queue() are just used to
figure out if sock_release() need to be called. So this patch
moves sock_release() into nvmet_tcp_alloc_queue() and make it
a void function.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

drivers/nvme/target/tcp.c

@@ -1621,15 +1621,17 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
 	return ret;
 }
 
-static int nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,
+static void nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,
 		struct socket *newsock)
 {
 	struct nvmet_tcp_queue *queue;
 	int ret;
 
 	queue = kzalloc(sizeof(*queue), GFP_KERNEL);
-	if (!queue)
-		return -ENOMEM;
+	if (!queue) {
+		ret = -ENOMEM;
+		goto out_release;
+	}
 
 	INIT_WORK(&queue->release_work, nvmet_tcp_release_queue_work);
 	INIT_WORK(&queue->io_work, nvmet_tcp_io_work);
@@ -1666,7 +1668,7 @@ static int nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,
 	if (ret)
 		goto out_destroy_sq;
 
-	return 0;
+	return;
 out_destroy_sq:
 	mutex_lock(&nvmet_tcp_queue_mutex);
 	list_del_init(&queue->queue_list);
@@ -1678,7 +1680,9 @@ static int nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,
 	ida_free(&nvmet_tcp_queue_ida, queue->idx);
 out_free_queue:
 	kfree(queue);
-	return ret;
+out_release:
+	pr_err("failed to allocate queue, error %d\n", ret);
+	sock_release(newsock);
 }
 
 static void nvmet_tcp_accept_work(struct work_struct *w)
@@ -1695,11 +1699,7 @@ static void nvmet_tcp_accept_work(struct work_struct *w)
 				pr_warn("failed to accept err=%d\n", ret);
 			return;
 		}
-		ret = nvmet_tcp_alloc_queue(port, newsock);
-		if (ret) {
-			pr_err("failed to allocate queue\n");
-			sock_release(newsock);
-		}
+		nvmet_tcp_alloc_queue(port, newsock);
 	}
 }