linux-kernel - Re: [PATCH 2/5] x86: move pci-nommu's dma

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Message-ID: <20080908120110.GJ3189@amd.com>
Date:	Mon, 8 Sep 2008 14:01:10 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com,
	tony.luck@...el.com, linux-ia64@...r.kernel.org,
	iommu@...ts.linux-foundation.org
Subject: Re: [PATCH 2/5] x86: move pci-nommu's dma_mask check to common code

On Mon, Sep 08, 2008 at 06:10:11PM +0900, FUJITA Tomonori wrote:
> The check to see if dev->dma_mask is NULL in pci-nommu is more
> appropriate for dma_alloc_coherent().
> 
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>

Acked-by: Joerg Roedel <joerg.roedel@....com>

> ---
>  arch/x86/kernel/pci-nommu.c   |    3 ---
>  include/asm-x86/dma-mapping.h |    3 +++
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c
> index 73853d3..0f51883 100644
> --- a/arch/x86/kernel/pci-nommu.c
> +++ b/arch/x86/kernel/pci-nommu.c
> @@ -80,9 +80,6 @@ nommu_alloc_coherent(struct device *hwdev, size_t size,
>  	int node;
>  	struct page *page;
>  
> -	if (hwdev->dma_mask == NULL)
> -		return NULL;
> -
>  	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
>  	gfp |= __GFP_ZERO;
>  
> diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
> index bc6c8df..39d3641 100644
> --- a/include/asm-x86/dma-mapping.h
> +++ b/include/asm-x86/dma-mapping.h
> @@ -256,6 +256,9 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
>  		gfp |= GFP_DMA;
>  	}
>  
> +	if (!dev->dma_mask)
> +		return NULL;
> +
>  	if (ops->alloc_coherent)
>  		return ops->alloc_coherent(dev, size,
>  				dma_handle, gfp);
> -- 
> 1.5.5.GIT
> 
> 

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