Re: [PATCH v2] iommu/dma: Rationalise types for DMA masks

From: Christoph Hellwig
Date: Wed Dec 11 2019 - 14:02:40 EST

On Wed, Dec 11, 2019 at 06:33:26PM +0000, Robin Murphy wrote:
> Since iommu_dma_alloc_iova() combines incoming masks with the u64 bus
> limit, it makes more sense to pass them around in their native u64
> rather than converting to dma_addr_t early. Do that, and resolve the
> remaining type discrepancy against the domain geometry with a cheeky
> cast to keep things simple.
> Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>

Looks good to me:

Reviewed-by: Christoph Hellwig <hch@xxxxxx>

Joerg, let me know if you want to pick this up through the iommu tree as
it touches the iommu code, or through the dma-mapping tree that
introduced the warning.