Re: [Xen-devel] [PATCH] xen/arm: Return correct code error for xen_swiotlb_map_page

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Nov 06, 2014 at 07:14:51PM +0000, Stefano Stabellini wrote:
> On Thu, 6 Nov 2014, Frediano Ziglio wrote:
> > 2014-11-06 17:30 GMT+00:00 Stefano Stabellini 
> > <stefano.stabellini@xxxxxxxxxxxxx>:
> >       On Thu, 6 Nov 2014, Frediano Ziglio wrote:
> >       > On ARM error code is not 0 so avoid to return it as error.
> >       >
> >       > Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
> > 
> >       Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > 
> > 
> >       Could you please fix the same error in lib/swiotlb.c too please?
> > 
> > 
> > Same patch or another ?
> > 
> 
> Another

It might break the build. Please double-check that it does not affect
ia64.
> 
> >  
> >       >  drivers/xen/swiotlb-xen.c | 2 +-
> >       >  1 file changed, 1 insertion(+), 1 deletion(-)
> >       >
> >       > diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
> >       > index ebd8f21..3b8d628 100644
> >       > --- a/drivers/xen/swiotlb-xen.c
> >       > +++ b/drivers/xen/swiotlb-xen.c
> >       > @@ -425,7 +425,7 @@ dma_addr_t xen_swiotlb_map_page(struct device 
> > *dev, struct page *page,
> >       >        */
> >       >       if (!dma_capable(dev, dev_addr, size)) {
> >       >               swiotlb_tbl_unmap_single(dev, map, size, dir);
> >       > -             dev_addr = 0;
> >       > +             dev_addr = DMA_ERROR_CODE;

That looks Ok to me.

> >       >       }
> >       >       return dev_addr;
> >       >  }
> >       > --
> >       > 1.9.1
> >       >
> >       >
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