Subject: Re: [PATCH 1/5] iommu: Replace uses of IOMMU_CAP_CACHE_COHERENCY with dev_is_dma_coherent()

From: Christoph Hellwig <[email-masked]>
Date: Wed, 6 Apr 2022 17:50:56 +0200

On Wed, Apr 06, 2022 at 12:18:23PM -0300, Jason Gunthorpe wrote:
> > Oh, I didn't know about device_get_dma_attr()..

Which is completely broken for any non-OF, non-ACPI plaform.