nvme-rdma: only clear queue flags after successful connect

Otherwise, nvme_rdma_stop_and_clear_queue() will incorrectly
try to stop/free rdma qps/cm_ids that are already freed.

Fixes: e89ca58f9c ("nvme-rdma: add DELETING queue flag")
Reported-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

drivers/nvme/host/rdma.c

@@ -561,7 +561,6 @@ static int nvme_rdma_init_queue(struct nvme_rdma_ctrl *ctrl,
 
 	queue = &ctrl->queues[idx];
 	queue->ctrl = ctrl;
-	queue->flags = 0;
 	init_completion(&queue->cm_done);
 
 	if (idx > 0)
@@ -595,6 +594,7 @@ static int nvme_rdma_init_queue(struct nvme_rdma_ctrl *ctrl,
 		goto out_destroy_cm_id;
 	}
 
+	clear_bit(NVME_RDMA_Q_DELETING, &queue->flags);
 	set_bit(NVME_RDMA_Q_CONNECTED, &queue->flags);
 
 	return 0;