[PATCH v4 3/8] nvme-rdma: Update number of hardware queues before using them

[Daniel Wagner]

When the number of hardware queues changes during resetting we should
update the tagset first before using it.

Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Daniel Wagner <dwagner@xxxxxxx>
---
 drivers/nvme/host/rdma.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 69ae67652f38..de2a8950d282 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -965,6 +965,7 @@ static void nvme_rdma_destroy_io_queues(struct nvme_rdma_ctrl *ctrl,
 static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 {
 	int ret;
+	u32 prior_q_cnt = ctrl->ctrl.queue_count;
 
 	ret = nvme_rdma_alloc_io_queues(ctrl);
 	if (ret)
@@ -982,13 +983,7 @@ static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 			ret = PTR_ERR(ctrl->ctrl.connect_q);
 			goto out_free_tag_set;
 		}
-	}
-
-	ret = nvme_rdma_start_io_queues(ctrl);
-	if (ret)
-		goto out_cleanup_connect_q;
-
-	if (!new) {
+	} else if (prior_q_cnt != ctrl->ctrl.queue_count) {
 		nvme_start_queues(&ctrl->ctrl);
 		if (!nvme_wait_freeze_timeout(&ctrl->ctrl, NVME_IO_TIMEOUT)) {
 			/*
@@ -1004,6 +999,10 @@ static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 		nvme_unfreeze(&ctrl->ctrl);
 	}
 
+	ret = nvme_rdma_start_io_queues(ctrl);
+	if (ret)
+		goto out_cleanup_connect_q;
+
 	return 0;
 
 out_wait_freeze_timed_out:
-- 
2.29.2