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intel-iommu mistakenly uses offset_pfn when caching mode is enabled 

intel_map_sg used offset_pfn which was set to zero when invalidating the IOTLB.
intel_map_sg now uses size variable for this matter.

Signed-off-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Nadav Amit 2010-04-01 13:24:35 +03:00 committed by David Woodhouse
parent a45946abb8
commit 8bdd77dd4e
1 changed files with 1 additions and 2 deletions
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3
drivers/pci/intel-iommu.c
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@ -2860,7 +2860,6 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne
struct dmar_domain *domain;
size_t size = 0;
int prot = 0;
size_t offset_pfn = 0;
struct iova *iova = NULL;
int ret;
struct scatterlist *sg;
@ -2914,7 +2913,7 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne
/* it's a non-present to present mapping. Only flush if caching mode */
if (cap_caching_mode(iommu->cap))
iommu_flush_iotlb_psi(iommu, 0, start_vpfn, offset_pfn);
iommu_flush_iotlb_psi(iommu, 0, start_vpfn, size);
else
iommu_flush_write_buffer(iommu);