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| author | Joerg Roedel <joerg.roedel@amd.com> | 2009-09-02 17:02:47 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-09-03 16:03:41 +0200 |
| commit | 38a76eeeafb251bf67d143a34b37a8105cff302e (patch) | |
| tree | f5fbe58002425e7424937678fd87b35f9e3c9280 /arch/x86/kernel | |
| parent | 9355a08186e52b7c120adea91c984923b54efa10 (diff) | |
x86/amd-iommu: Use fetch_pte in iommu_unmap_page
Instead of reimplementing existing logic use fetch_pte to
walk the page table in iommu_unmap_page.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 19 |
1 files changed, 3 insertions, 16 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 29bcd358b6ce..5e5279899994 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -546,23 +546,10 @@ static int iommu_map_page(struct protection_domain *dom, static void iommu_unmap_page(struct protection_domain *dom, unsigned long bus_addr) { - u64 *pte; - - pte = &dom->pt_root[IOMMU_PTE_L2_INDEX(bus_addr)]; - - if (!IOMMU_PTE_PRESENT(*pte)) - return; - - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L1_INDEX(bus_addr)]; - - if (!IOMMU_PTE_PRESENT(*pte)) - return; - - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L1_INDEX(bus_addr)]; + u64 *pte = fetch_pte(dom, bus_addr); - *pte = 0; + if (pte) + *pte = 0; } /* |