On Wednesday 14 January 2015 14:56:33 Rameshwar Sahu wrote:

quoted

Also add the correct dma-ranges property in the parent, or else this will
fail in the future once we add proper checks to dma_set_mask.

I see arch/arm64 kernel doesn't use dma range value parsed from
dma-range property currently, I will check it more.
It doesn't use dma_pfn_offset value calculated by the dma-ranges in
dma mapping API.
dma-ranges value should test properly before adding.
Is there any use to add this dma-ranges properly if arch code doesn't support ??

Of course: the dt needs to describe the hardware correctly. This is
just a bug in the current arm64 code and it will soon be fixed.

	Arnd