linux-kernel - [PATCH 11/19] swiotlb-xen: Make 'xen_swiotlb_sync

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Date:	Tue, 22 Jun 2010 15:42:44 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	linux-kernel@...r.kernel.org, fujita.tomonori@....ntt.co.jp,
	iommu@...ts.linux-foundation.org, albert_herranz@...oo.es,
	x86@...nel.org
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 11/19] swiotlb-xen: Make 'xen_swiotlb_sync_single' work.

Refer to "swiotlb-xen: Make 'xen_swiotlb_[map|unmap]_page' work." for
details why we want to use our own address translation mechanism.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 lib/swiotlb-xen.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/swiotlb-xen.c b/lib/swiotlb-xen.c
index efafcce..ca6c537 100644
--- a/lib/swiotlb-xen.c
+++ b/lib/swiotlb-xen.c
@@ -282,11 +282,12 @@ xen_swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
 			size_t size, enum dma_data_direction dir,
 			enum dma_sync_target target)
 {
-	phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
+	phys_addr_t paddr = xen_bus_to_phys(hwdev, dev_addr);
 
 	BUG_ON(dir == DMA_NONE);
 
-	if (is_xen_swiotlb_buffer(paddr)) {
+	/* NOTE: We use dev_addr here, not paddr! */
+	if (is_xen_swiotlb_buffer(dev_addr)) {
 		swiotlb_tbl_sync_single(hwdev, phys_to_virt(paddr), size, dir,
 				       target);
 		return;
-- 
1.7.0.1

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