Re: [PATCH 16/23] iommu/arm-smmu: Prepare for multiple DMA domain types

[Joerg Roedel]

On Wed, Jul 21, 2021 at 07:20:27PM +0100, Robin Murphy wrote:
> -	if (type == IOMMU_DOMAIN_DMA && using_legacy_binding)
> +	if ((type & __IOMMU_DOMAIN_DMA_API) && using_legacy_binding)

Hmm, I wonder whether it is time to introduce helpers for these checks?

Something like iommu_domain_is_dma() is more readable.