[PATCH 3/6] nvme-auth: use xarray instead of linked list

[Christoph Hellwig]

> @@ -907,33 +915,28 @@ EXPORT_SYMBOL_GPL(nvme_auth_negotiate);
>  int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid)
>  {
>  	struct nvme_dhchap_queue_context *chap;
> -	int ret;
>  
> +	chap = xa_load(&ctrl->dhchap_auth_xa, qid);
> +	if (!chap) {
> +		dev_warn(ctrl->device,
> +			 "qid %d: authentication not initialized!",
> +			 qid);
> +		return -ENOENT;
>  	}
> +	flush_work(&chap->auth_work);

What protects chap from going away after the load, but before use?