[RFC PATCH] ARM64: PCI: inherit root controller's dma-coherent

[Arnd Bergmann]

On Thursday 27 November 2014 02:39:59 Jon Masters wrote:
> We're looking at this at the moment (in addition to having the ACPI specification
> clarified to indicate that there is no safe default assumption, requiring that
> DMA masters always indicate their coherency or otherwise via a _CCA whether true
> or false). 

I think for arm64, this should be easy: since ACPI is only for servers, we can
rely on the fact that the devices have cache-coherent DMA all the time. Let's
not over-complicate the ACPI case with all the special hacks we need for embedded.

	Arnd