From: Joerg Roedel <joerg.roedel@amd.com>
Date: Mon, 8 Dec 2008 13:40:26 +0000 (+0100)
Subject: AMD IOMMU: __unmap_single: check for bad_dma_address instead of 0
X-Git-Tag: v2.6.28-rc8~42^2~1
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?p=linux-2.6-omap-h63xx.git;a=commitdiff_plain;h=b8d9905d025d80a2357e8ce4704fde2923f6a1bd

AMD IOMMU: __unmap_single: check for bad_dma_address instead of 0

Impact: minor fix

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 3133a0ea09f..a7b6dec6fc3 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -983,7 +983,8 @@ static void __unmap_single(struct amd_iommu *iommu,
 	dma_addr_t i, start;
 	unsigned int pages;
 
-	if ((dma_addr == 0) || (dma_addr + size > dma_dom->aperture_size))
+	if ((dma_addr == bad_dma_address) ||
+	    (dma_addr + size > dma_dom->aperture_size))
 		return;
 
 	pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);