Re: [PATCH 4/5] sparc64/pci_sun4v: allow large DMA masks

From: David Miller
Date: Fri Feb 15 2019 - 13:35:36 EST

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


> the mapping method.
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>