[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>

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; 
 }