nvmet-rdma: don't forget to delete a queue from the list of connection failed

In case we accepted a queue connection and it failed, we might not
remove the queue from the list until we unload and clean it up.
We should delete it from the queue list on the relevant handler.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>

drivers/nvme/target/rdma.c

@@ -1066,6 +1066,7 @@ nvmet_rdma_alloc_queue(struct nvmet_rdma_device *ndev,
 	spin_lock_init(&queue->rsp_wr_wait_lock);
 	INIT_LIST_HEAD(&queue->free_rsps);
 	spin_lock_init(&queue->rsps_lock);
+	INIT_LIST_HEAD(&queue->queue_list);
 
 	queue->idx = ida_simple_get(&nvmet_rdma_queue_ida, 0, 0, GFP_KERNEL);
 	if (queue->idx < 0) {
@@ -1269,7 +1270,12 @@ static void nvmet_rdma_queue_connect_fail(struct rdma_cm_id *cm_id,
 {
 	WARN_ON_ONCE(queue->state != NVMET_RDMA_Q_CONNECTING);
 
-	pr_err("failed to connect queue\n");
+	mutex_lock(&nvmet_rdma_queue_mutex);
+	if (!list_empty(&queue->queue_list))
+		list_del_init(&queue->queue_list);
+	mutex_unlock(&nvmet_rdma_queue_mutex);
+
+	pr_err("failed to connect queue %d\n", queue->idx);
 	schedule_work(&queue->release_work);
 }