[PATCH] ARM: dma-mapping: highbank: Restrict DMA to 32-bit addresses

Russell King - ARM Linux linux at arm.linux.org.uk
Thu Aug 1 16:45:52 EDT 2013

On Thu, Aug 01, 2013 at 10:40:47PM +0200, Andreas Herrmann wrote:
> Some devices on Calxeda ECX-2000 are restricted to 32-bit DMA. Thus
> the platform needs to set dma_zone_size, otherwise dma-mapping code is
> complaining, e.g.
>   calxedaxgmac fff50000.ethernet: coherent DMA mask 0xffffffff is smaller than system
>     GFP_DMA mask 0xffffffffffffffff
> Same is true for sata_highbank. For the latter dma_coherent_mask could
> be increased but due to the lack of DMA32 zone we need to adapt
> arm_dma_limit in general.

Please wait until I post my dma mask patches.  Thanks.

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