swiotlb-xen: update dev_addr after swapping pages
authorStefano Stabellini <sstabellini@kernel.org>
Thu, 19 Jan 2017 18:39:09 +0000 (10:39 -0800)
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Fri, 20 Jan 2017 13:46:37 +0000 (08:46 -0500)
commitf1225ee4c8fcf09afaa199b8b1f0450f38b8cd11
tree11f43863f5cc53bb54d1dba9c8254998c47840e7
parent602d9858f07c72eab64f5f00e2fae55f9902cfbe
swiotlb-xen: update dev_addr after swapping pages

In xen_swiotlb_map_page and xen_swiotlb_map_sg_attrs, if the original
page is not suitable, we swap it for another page from the swiotlb
pool.

In these cases, we don't update the previously calculated dma address
for the page before calling xen_dma_map_page. Thus, we end up calling
xen_dma_map_page passing the wrong dev_addr, resulting in
xen_dma_map_page mistakenly assuming that the page is foreign when it is
local.

Fix the bug by updating dev_addr appropriately.

This change has no effect on x86, because xen_dma_map_page is a stub
there.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Pooya Keshavarzi <Pooya.Keshavarzi@de.bosch.com>
Tested-by: Pooya Keshavarzi <Pooya.Keshavarzi@de.bosch.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
drivers/xen/swiotlb-xen.c