From 840b131125d65757015dbe5d97d320654cf3da86 Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 10 Dec 2014 14:48:43 +0000 Subject: [PATCH] Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single" commit dbdd74763f1faf799fbb9ed30423182e92919378 upstream. This reverts commit 2c3fc8d26dd09b9d7069687eead849ee81c78e46. This commit broke on x86 PV because entries in the generic SWIOTLB are indexed using (pseudo-)physical address not DMA address and these are not the same in a x86 PV guest. Signed-off-by: David Vrabel Reviewed-by: Stefano Stabellini Signed-off-by: Greg Kroah-Hartman --- 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 9df5d6ec7eec..f3a9d831d0f9 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -449,7 +449,7 @@ static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr, /* NOTE: We use dev_addr here, not paddr! */ if (is_xen_swiotlb_buffer(dev_addr)) { - swiotlb_tbl_unmap_single(hwdev, dev_addr, size, dir); + swiotlb_tbl_unmap_single(hwdev, paddr, size, dir); return; } -- 2.34.1