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| author | James Morris <jmorris@namei.org> | 2011-05-19 18:51:57 +1000 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-05-19 18:51:57 +1000 |
| commit | 12a5a2621b1ee14d32beca35304d7c6076a58815 (patch) | |
| tree | 213e13f99de690b3c4a510f504393b63ada626bd /arch/x86/kernel/pci-gart_64.c | |
| parent | e77dc3460fa59be5759e9327ad882868eee9d61b (diff) | |
| parent | 61c4f2c81c61f73549928dfd9f3e8f26aa36a8cf (diff) | |
| download | linux-12a5a2621b1ee14d32beca35304d7c6076a58815.tar.bz2 | |
Merge branch 'master' into next
Conflicts:
include/linux/capability.h
Manually resolve merge conflict w/ thanks to Stephen Rothwell.
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'arch/x86/kernel/pci-gart_64.c')
| -rw-r--r-- | arch/x86/kernel/pci-gart_64.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c index 82ada01625b9..b117efd24f71 100644 --- a/arch/x86/kernel/pci-gart_64.c +++ b/arch/x86/kernel/pci-gart_64.c @@ -81,6 +81,9 @@ static u32 gart_unmapped_entry; #define AGPEXTERN #endif +/* GART can only remap to physical addresses < 1TB */ +#define GART_MAX_PHYS_ADDR (1ULL << 40) + /* backdoor interface to AGP driver */ AGPEXTERN int agp_memory_reserved; AGPEXTERN __u32 *agp_gatt_table; @@ -212,9 +215,13 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem, size_t size, int dir, unsigned long align_mask) { unsigned long npages = iommu_num_pages(phys_mem, size, PAGE_SIZE); - unsigned long iommu_page = alloc_iommu(dev, npages, align_mask); + unsigned long iommu_page; int i; + if (unlikely(phys_mem + size > GART_MAX_PHYS_ADDR)) + return bad_dma_addr; + + iommu_page = alloc_iommu(dev, npages, align_mask); if (iommu_page == -1) { if (!nonforced_iommu(dev, phys_mem, size)) return phys_mem; |