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

[Robin Murphy]

On 2021-07-26 13:46, Joerg Roedel wrote:
> 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.

Ha, I had exactly that at one point, except I think in the order of 
iommu_is_dma_domain() :)

The end result didn't seem to give enough extra clarity to justify the 
header churn for me, but I'm happy to be wrong about that if you prefer.

Cheers,
Robin.