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

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Date:	Thu, 6 Nov 2014 19:14:51 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Frediano Ziglio <freddy77@...il.com>
CC:	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Frediano Ziglio <frediano.ziglio@...wei.com>,
	<xen-devel@...ts.xenproject.org>,
	"Boris Ostrovsky" <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH] xen/arm: Return correct code error for
 xen_swiotlb_map_page

On Thu, 6 Nov 2014, Frediano Ziglio wrote:
> 2014-11-06 17:30 GMT+00:00 Stefano Stabellini <stefano.stabellini@...citrix.com>:
>       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@...wei.com>
> 
>       Acked-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> 
> 
>       Could you please fix the same error in lib/swiotlb.c too please?
> 
> 
> Same patch or another ?
> 

Another

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