[PATCH 05/10] nvme: add error handling support for add_disk()

[Christoph Hellwig]

On Mon, Aug 23, 2021 at 01:29:25PM -0700, Luis Chamberlain wrote:
> +	rc = device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups);
> +	if (rc)
> +		goto out_cleanup_ns_from_list;
> +

Nit: no real need for the rc variable here as we never use the actual
value.

>  	if (!nvme_ns_head_multipath(ns->head))
>  		nvme_add_ns_cdev(ns);
>  
> @@ -3785,6 +3789,10 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid,
>  
>  	return;
>  
> + out_cleanup_ns_from_list:
> +	down_write(&ctrl->namespaces_rwsem);
> +	list_del_init(&ns->list);
> +	up_write(&ctrl->namespaces_rwsem);

This also needs to do a nvme_put_ctrl.