Date: Thu, 1 Aug 2013 21:45:52 +0100
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Andreas Herrmann <andreas.herrmann@calxeda.com>
Cc: Rob Herring <rob.herring@calxeda.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Hiroshi Doyu <hdoyu@nvidia.com>, Will Deacon <will.deacon@arm.com>,
        Nicolas Pitre <nicolas.pitre@linaro.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ARM: dma-mapping: highbank: Restrict DMA to 32-bit
	addresses
Message-ID: <20130801204552.GI23006@n2100.arm.linux.org.uk>
References: <20130801204047.GY20842@alberich>
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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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