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List:       linux-parisc
Subject:    Re: [PATCH 4/5] sparc64/pci_sun4v: allow large DMA masks
From:       David Miller <davem () davemloft ! net>
Date:       2019-02-15 18:35:31
Message-ID: 20190215.103531.2177713502969625146.davem () davemloft ! net
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From: Christoph Hellwig <hch@lst.de>
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@lst.de>

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