linux-kernel - Re: [Xen-devel] [PATCH 1/2] swiotlb-xen: add missing xen_dma_map

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Date:	Tue, 12 Nov 2013 17:03:42 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	<xen-devel@...ts.xensource.com>, <konrad@...nel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [Xen-devel] [PATCH 1/2] swiotlb-xen: add missing xen_dma_map_page
 call

On Tue, 12 Nov 2013, Konrad Rzeszutek Wilk wrote:
> On Tue, Nov 12, 2013 at 02:11:59PM +0000, Stefano Stabellini wrote:
> > swiotlb-xen is missing a xen_dma_map_page call in
> > xen_swiotlb_map_sg_attrs, in the slow path.
> 
> s/slow/bounce buffer/ I believe?

right


> > Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> > ---
> >  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
> > 
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@...ts.xen.org
> > http://lists.xen.org/xen-devel
> 
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