[PATCH] x86-64: Fix off by one error in IOMMU boundary checking

[powerpc.git] / arch / x86_64 / kernel / pci-gart.c

diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c
index fc1960f..030eb37 100644 (file)
--- 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; 
 }