[3.16.y-ckt stable] Patch "swiotlb-xen: pass dev_addr to xen_dma_unmap_page and xen_dma_sync_single_for_cpu" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    swiotlb-xen: pass dev_addr to xen_dma_unmap_page and xen_dma_sync_single_for_cpu

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt4.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 881402ed4b492bd244d3a57278eff630b47b9fce Mon Sep 17 00:00:00 2001
From: Stefano Stabellini <stefano.stabellini at eu.citrix.com>
Date: Fri, 21 Nov 2014 11:09:39 +0000
Subject: swiotlb-xen: pass dev_addr to xen_dma_unmap_page and
 xen_dma_sync_single_for_cpu

commit d6883e6f32e07ef2cc974753ba00927de099e6d7 upstream.

xen_dma_unmap_page and xen_dma_sync_single_for_cpu take a dma_addr_t
handle as argument, not a physical address.

Signed-off-by: Stefano Stabellini <stefano.stabellini at eu.citrix.com>
Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/xen/swiotlb-xen.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index ebd8f218a788..bc6fb0d24ad5 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -447,7 +447,7 @@ static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr,

 	BUG_ON(dir == DMA_NONE);

-	xen_dma_unmap_page(hwdev, paddr, size, dir, attrs);
+	xen_dma_unmap_page(hwdev, dev_addr, size, dir, attrs);

 	/* NOTE: We use dev_addr here, not paddr! */
 	if (is_xen_swiotlb_buffer(dev_addr)) {
@@ -495,14 +495,14 @@ xen_swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
 	BUG_ON(dir == DMA_NONE);

 	if (target == SYNC_FOR_CPU)
-		xen_dma_sync_single_for_cpu(hwdev, paddr, size, dir);
+		xen_dma_sync_single_for_cpu(hwdev, dev_addr, size, dir);

 	/* NOTE: We use dev_addr here, not paddr! */
 	if (is_xen_swiotlb_buffer(dev_addr))
 		swiotlb_tbl_sync_single(hwdev, paddr, size, dir, target);

 	if (target == SYNC_FOR_DEVICE)
-		xen_dma_sync_single_for_cpu(hwdev, paddr, size, dir);
+		xen_dma_sync_single_for_cpu(hwdev, dev_addr, size, dir);

 	if (dir != DMA_FROM_DEVICE)
 		return;
--
2.1.4