Re: [PATCH v6 4/6] iommufd/selftest: Add mock_domain_cache_invalidate_user support

[Jason Gunthorpe]

On Fri, Nov 17, 2023 at 05:07:15AM -0800, Yi Liu wrote:
> +static int
> +mock_domain_cache_invalidate_user(struct iommu_domain *domain,
> +				  struct iommu_user_data_array *array,
> +				  u32 *error_code)
> +{
> +	struct mock_iommu_domain_nested *mock_nested =
> +		container_of(domain, struct mock_iommu_domain_nested, domain);
> +	struct iommu_hwpt_invalidate_selftest inv;
> +	int rc = 0;
> +	int i, j;
> +
> +	if (domain->type != IOMMU_DOMAIN_NESTED)
> +		return -EINVAL;

The core code already checked this, and it is only present on
domain_nested_ops so it is checked twice already..

Jason