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intel-iommu: Don't set identity mapping for bypassed graphics devices

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We should check iommu_dummy() _first_, because that means it's attached
to an iommu that we've just disabled completely. At the moment, we might
try to put the device into the identity mapping domain.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2009-07-04 10:40:38 +01:00
parent 5a5e02a614
commit 1e4c64c46d
1 changed files with 5 additions and 2 deletions
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7
drivers/pci/intel-iommu.c
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@ -2447,8 +2447,11 @@ static int iommu_no_mapping(struct pci_dev *pdev)
{ {
int found; int found;
if (iommu_dummy(pdev))
return 1;
if (!iommu_identity_mapping) if (!iommu_identity_mapping)
return iommu_dummy(pdev); return 0;
found = identity_mapping(pdev); found = identity_mapping(pdev);
if (found) { if (found) {
@ -2480,7 +2483,7 @@ static int iommu_no_mapping(struct pci_dev *pdev)
} }
} }
return iommu_dummy(pdev); return 0;
} }
static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,