nvme-fc: update hardware queues before using them

In case the number of hardware queues changes, we need to update the tagset and the mapping of ctx to hctx first. If we try to create and connect the I/O queues first, this operation will fail (target will reject the connect call due to the wrong number of queues) and hence we bail out of the recreate function. Then we will to try the very same operation again, thus we don't make any progress. Signed-off-by: Daniel Wagner <[email protected]> Reviewed-by: Ming Lei <[email protected]> Reviewed-by: Himanshu Madhani <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Reviewed-by: James Smart <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]>
mrcsosa · Sep 21, 2021 · 555f66d · 555f66d
1 parent 858560b
commit 555f66d
Showing 1 changed file with 8 additions and 8 deletions.
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
@@ -2951,14 +2951,6 @@ nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl)
 	if (ctrl->ctrl.queue_count == 1)
 		return 0;
 
-	ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
-	if (ret)
-		goto out_free_io_queues;
-
-	ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
-	if (ret)
-		goto out_delete_hw_queues;
-
 	if (prior_ioq_cnt != nr_io_queues) {
 		dev_info(ctrl->ctrl.device,
 			"reconnect: revising io queue count from %d to %d\n",
@@ -2968,6 +2960,14 @@ nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl)
 		nvme_unfreeze(&ctrl->ctrl);
 	}
 
+	ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
+	if (ret)
+		goto out_free_io_queues;
+
+	ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
+	if (ret)
+		goto out_delete_hw_queues;
+
 	return 0;
 
 out_delete_hw_queues: