Commit 6a43e574 authored Jul 02, 2009 by David Woodhouse

intel-iommu: Don't keep freeing page zero in dma_pte_free_pagetable()



Check dma_pte_present() and only free the page if there _is_ one.
Kind of surprising that there was no warning about this.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

parent 75e6bf96

drivers/pci/intel-iommu.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -826,8 +826,10 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain,
		continue;
		}
		do {
		if (dma_pte_present(pte)) {
		free_pgtable_page(phys_to_virt(dma_pte_addr(pte)));
		dma_clear_pte(pte);
		}
		pte++;
		tmp += level_size(level);
		} while (!first_pte_in_page(pte) &&