nvme-rdma: destroy nvme queue rdma resources on connect failure

After address resolution, the nvme_rdma_queue rdma resources are
allocated.  If rdma route resolution or the connect fails, or the
controller reconnect times out and gives up, then the rdma resources
need to be freed.  Otherwise, rdma resources are leaked.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimbrg.me>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 15b0c1d025f56032e6678e8c1549d02551a5ca19..a9d43f09963fae6d814eb67f328afa2f0160ea7e 100644 (file)
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -82,6 +82,7 @@ struct nvme_rdma_request {
 
 enum nvme_rdma_queue_flags {
        NVME_RDMA_Q_CONNECTED = (1 << 0),
+       NVME_RDMA_IB_QUEUE_ALLOCATED = (1 << 1),
 };
 
 struct nvme_rdma_queue {
@@ -480,9 +481,14 @@ out_err:
 
 static void nvme_rdma_destroy_queue_ib(struct nvme_rdma_queue *queue)
 {
-       struct nvme_rdma_device *dev = queue->device;
-       struct ib_device *ibdev = dev->dev;
+       struct nvme_rdma_device *dev;
+       struct ib_device *ibdev;
 
+       if (!test_and_clear_bit(NVME_RDMA_IB_QUEUE_ALLOCATED, &queue->flags))
+               return;
+
+       dev = queue->device;
+       ibdev = dev->dev;
        rdma_destroy_qp(queue->cm_id);
        ib_free_cq(queue->ib_cq);
 
@@ -533,6 +539,7 @@ static int nvme_rdma_create_queue_ib(struct nvme_rdma_queue *queue,
                ret = -ENOMEM;
                goto out_destroy_qp;
        }
+       set_bit(NVME_RDMA_IB_QUEUE_ALLOCATED, &queue->flags);
 
        return 0;
 
@@ -590,6 +597,7 @@ static int nvme_rdma_init_queue(struct nvme_rdma_ctrl *ctrl,
        return 0;
 
 out_destroy_cm_id:
+       nvme_rdma_destroy_queue_ib(queue);
        rdma_destroy_id(queue->cm_id);
        return ret;
 }
@@ -652,7 +660,7 @@ static int nvme_rdma_init_io_queues(struct nvme_rdma_ctrl *ctrl)
        return 0;
 
 out_free_queues:
-       for (; i >= 1; i--)
+       for (i--; i >= 1; i--)
                nvme_rdma_stop_and_free_queue(&ctrl->queues[i]);
 
        return ret;