nvme-rdma: introduce nvme_rdma_start_queue

This should pair with nvme_rdma_stop_queue.  While this is not a complete
inverse, it still pairs up pretty well because in fabrics we don't have a
disconnect capsule (yet) but we simply teardown the transport association.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index d87874e..09c4ea8 100644 (file)
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -594,24 +594,38 @@ static void nvme_rdma_stop_io_queues(struct nvme_rdma_ctrl *ctrl)
                nvme_rdma_stop_queue(&ctrl->queues[i]);
 }
 
-static int nvme_rdma_connect_io_queues(struct nvme_rdma_ctrl *ctrl)
+static int nvme_rdma_start_queue(struct nvme_rdma_ctrl *ctrl, int idx)
+{
+       int ret;
+
+       if (idx)
+               ret = nvmf_connect_io_queue(&ctrl->ctrl, idx);
+       else
+               ret = nvmf_connect_admin_queue(&ctrl->ctrl);
+
+       if (!ret)
+               set_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[idx].flags);
+       else
+               dev_info(ctrl->ctrl.device,
+                       "failed to connect queue: %d ret=%d\n", idx, ret);
+       return ret;
+}
+
+static int nvme_rdma_start_io_queues(struct nvme_rdma_ctrl *ctrl)
 {
        int i, ret = 0;
 
        for (i = 1; i < ctrl->ctrl.queue_count; i++) {
-               ret = nvmf_connect_io_queue(&ctrl->ctrl, i);
-               if (ret) {
-                       dev_info(ctrl->ctrl.device,
-                               "failed to connect i/o queue: %d\n", ret);
+               ret = nvme_rdma_start_queue(ctrl, i);
+               if (ret)
                        goto out_stop_queues;
-               }
-               set_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[i].flags);
        }
 
        return 0;
 
 out_stop_queues:
-       nvme_rdma_stop_io_queues(ctrl);
+       for (i--; i >= 1; i--)
+               nvme_rdma_stop_queue(&ctrl->queues[i]);
        return ret;
 }
 
@@ -759,12 +773,10 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
                        goto out_free_queue;
        }
 
-       error = nvmf_connect_admin_queue(&ctrl->ctrl);
+       error = nvme_rdma_start_queue(ctrl, 0);
        if (error)
                goto out_cleanup_queue;
 
-       set_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[0].flags);
-
        error = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP,
                        &ctrl->ctrl.cap);
        if (error) {
@@ -845,7 +857,7 @@ static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
                        ctrl->ctrl.queue_count - 1);
        }
 
-       ret = nvme_rdma_connect_io_queues(ctrl);
+       ret = nvme_rdma_start_io_queues(ctrl);
        if (ret)
                goto out_cleanup_connect_q;