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

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Date:	Thu, 6 Nov 2014 17:07:31 +0000
From:	Frediano Ziglio <frediano.ziglio@...wei.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	<frediano.ziglio@...wei.com>
CC:	<xen-devel@...ts.xenproject.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] xen/arm: Return correct code error for xen_swiotlb_map_page

On ARM error code is not 0 so avoid to return it as error.

Signed-off-by: Frediano Ziglio <frediano.ziglio@...wei.com>
---
 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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