linux-kernel - [PATCH v2] swiotlb-xen: add missing xen_dma_map

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Date:	Fri, 15 Nov 2013 11:57:33 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	<konrad.wilk@...cle.com>
CC:	<stefano.stabellini@...citrix.com>,
	<xen-devel@...ts.xensource.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] swiotlb-xen: add missing xen_dma_map_page call

swiotlb-xen is missing a xen_dma_map_page call in
xen_swiotlb_map_sg_attrs, in the bounce buffer path.

Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>

Changes in v2:
- reworked commit message.
---
 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

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