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

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Message-ID: <alpine.DEB.2.02.1411061730240.22875@kaball.uk.xensource.com>
Date:	Thu, 6 Nov 2014 17:30:59 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Frediano Ziglio <frediano.ziglio@...wei.com>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	<xen-devel@...ts.xenproject.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] xen/arm: Return correct code error for
 xen_swiotlb_map_page

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?

>  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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