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@@ -718,15 +718,17 @@ static void dma_pte_clear_one(struct dmar_domain *domain, u64 addr)
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static void dma_pte_clear_range(struct dmar_domain *domain, u64 start, u64 end)
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{
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int addr_width = agaw_to_width(domain->agaw);
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+ int npages;
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start &= (((u64)1) << addr_width) - 1;
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end &= (((u64)1) << addr_width) - 1;
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/* in case it's partial page */
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start = PAGE_ALIGN(start);
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end &= PAGE_MASK;
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+ npages = (end - start) / VTD_PAGE_SIZE;
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/* we don't need lock here, nobody else touches the iova range */
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- while (start < end) {
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+ while (npages--) {
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dma_pte_clear_one(domain, start);
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start += VTD_PAGE_SIZE;
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}
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