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authorAndi Kleen <ak@suse.de>2007-02-13 15:26:24 +0300
committerAndi Kleen <andi@basil.nowhere.org>2007-02-13 15:26:24 +0300
commit00edefae050c2c2d1e26fa9984f8f529fbc45989 (patch)
tree048e9b69aa4907c41a02832dda9a035544ea04fc /arch/x86_64
parentffb6017563aa15f9a8cff9a30b861d42c2695894 (diff)
downloadlinux-00edefae050c2c2d1e26fa9984f8f529fbc45989.tar.xz
[PATCH] x86-64: Fix off by one error in IOMMU boundary checking
Should be harmless because there is normally no memory there, but technically it was incorrect. Pointed out by Leo Duran Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/kernel/pci-gart.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c
index fc1960f1f243..030eb3753358 100644
--- a/arch/x86_64/kernel/pci-gart.c
+++ b/arch/x86_64/kernel/pci-gart.c
@@ -185,7 +185,7 @@ static void iommu_full(struct device *dev, size_t size, int dir)
static inline int need_iommu(struct device *dev, unsigned long addr, size_t size)
{
u64 mask = *dev->dma_mask;
- int high = addr + size >= mask;
+ int high = addr + size > mask;
int mmu = high;
if (force_iommu)
mmu = 1;
@@ -195,7 +195,7 @@ static inline int need_iommu(struct device *dev, unsigned long addr, size_t size
static inline int nonforced_iommu(struct device *dev, unsigned long addr, size_t size)
{
u64 mask = *dev->dma_mask;
- int high = addr + size >= mask;
+ int high = addr + size > mask;
int mmu = high;
return mmu;
}