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>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index a0ac7197ffdd..341da41cde8b 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -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);