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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-07-04 10:40:38 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-07-04 10:40:44 +0100
commit1e4c64c46d413de84cc0b786bd6a9b555ba7d111 (patch)
tree5f7c9aa7801c59f88dacdcae3c6722c5d9149ebf /drivers/pci/intel-iommu.c
parent5a5e02a614e59db7536cd11029e6674adc41b191 (diff)
intel-iommu: Don't set identity mapping for bypassed graphics devices
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>
Diffstat (limited to 'drivers/pci/intel-iommu.c')
-rw-r--r--drivers/pci/intel-iommu.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index ad85e95d2dcc..3e3910127fc1 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2447,8 +2447,11 @@ static int iommu_no_mapping(struct pci_dev *pdev)
{
int found;
+ if (iommu_dummy(pdev))
+ return 1;
+
if (!iommu_identity_mapping)
- return iommu_dummy(pdev);
+ return 0;
found = identity_mapping(pdev);
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,