[PATCH 3/4] nvmet: Add controllers to configfs

[Sagi Grimberg]

> +void nvmet_ctrl_configfs_del(struct nvmet_ctrl *ctrl)
> +{
> +	if (d_inode(ctrl->group.cg_item.ci_dentry))
> +		configfs_unregister_group(&ctrl->group);

I'm not sure I understand the conditional here, care to explain?