From: Christoph Hellwig <hch@xxxxxx>
Date: Fri, 15 Feb 2019 15:45:58 +0100
> We've been moving to a model where the device just sets the DMA mask
> supported by it, instead of having to fallback to something it thinks
> the platform might support. Sparc64 is the remaining holdout forcing
> drivers to supply a matching mask. Change dma_4v_supported to just
> check if the supplied dma mask is large enough. and adjust the mapping
> code to check ATU presence in addition to the DMA mask to decice on
^^^^^^
"decide"
> the mapping method.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
