linux-kernel - Re: [PATCH v4 02/10] swiotlb-xen: replace dma_length with sg_dma

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Date:	Thu, 15 Aug 2013 15:45:57 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, Ian.Campbell@...rix.com
Subject: Re: [PATCH v4 02/10] swiotlb-xen: replace dma_length with
 sg_dma_len() macro

On Thu, Aug 15, 2013 at 12:10:46PM +0100, Stefano Stabellini wrote:
> swiotlb-xen has an implicit dependency on CONFIG_NEED_SG_DMA_LENGTH.
> Remove it by replacing dma_length with sg_dma_len.
> 

Ditto. Already took that one.
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> ---
>  drivers/xen/swiotlb-xen.c |    8 ++++----
>  1 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
> index aadffcf..1b2277c 100644
> --- a/drivers/xen/swiotlb-xen.c
> +++ b/drivers/xen/swiotlb-xen.c
> @@ -506,13 +506,13 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
>  				   to do proper error handling. */
>  				xen_swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir,
>  							   attrs);
> -				sgl[0].dma_length = 0;
> +				sg_dma_len(sgl) = 0;
>  				return DMA_ERROR_CODE;
>  			}
>  			sg->dma_address = xen_phys_to_bus(map);
>  		} else
>  			sg->dma_address = dev_addr;
> -		sg->dma_length = sg->length;
> +		sg_dma_len(sg) = sg->length;
>  	}
>  	return nelems;
>  }
> @@ -533,7 +533,7 @@ xen_swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
>  	BUG_ON(dir == DMA_NONE);
>  
>  	for_each_sg(sgl, sg, nelems, i)
> -		xen_unmap_single(hwdev, sg->dma_address, sg->dma_length, dir);
> +		xen_unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir);
>  
>  }
>  EXPORT_SYMBOL_GPL(xen_swiotlb_unmap_sg_attrs);
> @@ -555,7 +555,7 @@ xen_swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl,
>  
>  	for_each_sg(sgl, sg, nelems, i)
>  		xen_swiotlb_sync_single(hwdev, sg->dma_address,
> -					sg->dma_length, dir, target);
> +					sg_dma_len(sg), dir, target);
>  }
>  
>  void
> -- 
> 1.7.2.5
> 
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