linux-kernel - Re: [PATCH] intel-iommu: use coherent_dma_mask in alloc

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Date:	Sat, 18 Oct 2008 14:46:56 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	mgross@...ux.intel.com, mingo@...e.hu, grundler@...isc-linux.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] intel-iommu: use coherent_dma_mask in alloc_coherent

On Wed, 2008-10-15 at 16:08 +0900, FUJITA Tomonori wrote:
> This patch fixes intel-iommu to use dev->coherent_dma_mask in
> alloc_coherent. Currently, intel-iommu uses dev->dma_mask in
> alloc_coherent but alloc_coherent is supposed to use
> coherent_dma_mask. It could break drivers that uses smaller
> coherent_dma_mask than dma_mask (though the current code works for the
> majority that use the same mask for coherent_dma_mask and dma_mask).

I've fixed this up to cope with the fact that dma_mask can be bigger
than an 'unsigned long', and committed it to the iommu-2-6.git tree.

Thanks.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation

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