diff options
| -rw-r--r-- | drivers/pci/intel-iommu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 0c12d06bade6..002c8b95edf8 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -718,15 +718,17 @@ static void dma_pte_clear_one(struct dmar_domain *domain, u64 addr) static void dma_pte_clear_range(struct dmar_domain *domain, u64 start, u64 end) { int addr_width = agaw_to_width(domain->agaw); + int npages; start &= (((u64)1) << addr_width) - 1; end &= (((u64)1) << addr_width) - 1; /* in case it's partial page */ start = PAGE_ALIGN(start); end &= PAGE_MASK; + npages = (end - start) / VTD_PAGE_SIZE; /* we don't need lock here, nobody else touches the iova range */ - while (start < end) { + while (npages--) { dma_pte_clear_one(domain, start); start += VTD_PAGE_SIZE; } |