x86: convert gart to use is_buffer_dma_capable helper function

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index 0b99d4a06f74a8599248ab0768ee63a1e5b33356..1b0c412566e5ef7f07352c5c74d000fe321e5714 100644 (file)
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -214,24 +214,14 @@ 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 mmu = high;
-
-       if (force_iommu)
-               mmu = 1;
-
-       return mmu;
+       return force_iommu ||
+               !is_buffer_dma_capable(*dev->dma_mask, addr, 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 mmu = high;
-
-       return mmu;
+       return !is_buffer_dma_capable(*dev->dma_mask, addr, size);
 }
 
 /* Map a single continuous physical area into the IOMMU.