diff options
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 91981c8a9614..41ee4ad1dcf8 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -3191,6 +3191,7 @@ static bool amd_iommu_is_attach_deferred(struct device *dev) static bool quirks_force_identity_mapping(struct pci_dev *pdev) { + struct pci_dev *bridge; int class = pdev->class >> 8; /* AMD GPU vendor ID */ @@ -3202,7 +3203,8 @@ static bool quirks_force_identity_mapping(struct pci_dev *pdev) class != PCI_CLASS_DISPLAY_OTHER) return false; - if (pci_upstream_bridge(pdev)->vendor == PCI_VENDOR_ID_ATI) + bridge = pci_upstream_bridge(pdev); + if (bridge && bridge->vendor == PCI_VENDOR_ID_ATI) return false; /* It is the GPU in an APU, force identity domain */ |