linux-kernel - Re: [PATCH v2] swiotlb-xen: add missing xen_dma_map

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Date:	Fri, 15 Nov 2013 09:15:18 -0500
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
Subject: Re: [PATCH v2] swiotlb-xen: add missing xen_dma_map_page call

On Fri, Nov 15, 2013 at 11:57:33AM +0000, Stefano Stabellini wrote:
> swiotlb-xen is missing a xen_dma_map_page call in
> xen_swiotlb_map_sg_attrs, in the bounce buffer path.
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> 
Thank you!

Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>

> Changes in v2:
> - reworked commit message.
> ---
>  drivers/xen/swiotlb-xen.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
> index a224bc7..1eac073 100644
> --- a/drivers/xen/swiotlb-xen.c
> +++ b/drivers/xen/swiotlb-xen.c
> @@ -555,6 +555,11 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
>  				sg_dma_len(sgl) = 0;
>  				return 0;
>  			}
> +			xen_dma_map_page(hwdev, pfn_to_page(map >> PAGE_SHIFT),
> +						map & ~PAGE_MASK,
> +						sg->length,
> +						dir,
> +						attrs);
>  			sg->dma_address = xen_phys_to_bus(map);
>  		} else {
>  			/* we are not interested in the dma_addr returned by
> -- 
> 1.7.2.5
> 
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