On Wed, May 29, 2019 at 02:06:12PM +0000, Laurentiu Tudor wrote: > Thanks, hope this time everything is fine. I've applied it to the dma-mapping tree now. > When you get the time, please let me know your ideas on the next steps. I think the next step is to move the call to dma_alloc_from_dev_coherent from dma_alloc_attrs into the ->alloc instances. The only onces that really need it for now are the generic and legacy arm dma-direct code, and drivers/iommu/dma-iommu.c as well as the ARM DMA API code, as those are the ones use for architectures that declare coherent regions. The other iommus are not used on OF platforms (at least that's what my analysis said a while ago, feel free to double check it)
