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intel-iommu: Don't free too much in dma_pte_free_pagetable()

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The loop condition was wrong -- we should free a PMD only if its
_entire_ range is within the range we're intending to clear. The
early-termination condition was right, but not the loop.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse
2009-06-30 03:38:09 +01:00
parent 1bf20f0dc5
commit 3d7b0e4154
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/intel-iommu.c
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@@ -815,7 +815,7 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain,
if (tmp + level_size(level) - 1 > last_pfn) if (tmp + level_size(level) - 1 > last_pfn)
return; return;
while (tmp <= last_pfn) { while (tmp + level_size(level) - 1 <= last_pfn) {
pte = dma_pfn_level_pte(domain, tmp, level); pte = dma_pfn_level_pte(domain, tmp, level);
if (pte) { if (pte) {
free_pgtable_page( free_pgtable_page(