diff options
Diffstat (limited to 'drivers/pci/pci-acpi.c')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 2a4aa6468579..e1949f7efd9c 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -789,20 +789,34 @@ static void pci_acpi_optimize_delay(struct pci_dev *pdev, ACPI_FREE(obj); } +static void pci_acpi_set_untrusted(struct pci_dev *dev) +{ + u8 val; + + if (pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) + return; + if (device_property_read_u8(&dev->dev, "ExternalFacingPort", &val)) + return; + + /* + * These root ports expose PCIe (including DMA) outside of the + * system so make sure we treat them and everything behind as + * untrusted. + */ + if (val) + dev->untrusted = 1; +} + static void pci_acpi_setup(struct device *dev) { struct pci_dev *pci_dev = to_pci_dev(dev); struct acpi_device *adev = ACPI_COMPANION(dev); - int node; if (!adev) return; - node = acpi_get_node(adev->handle); - if (node != NUMA_NO_NODE) - set_dev_node(dev, node); - pci_acpi_optimize_delay(pci_dev, adev->handle); + pci_acpi_set_untrusted(pci_dev); pci_acpi_add_pm_notifier(adev, pci_dev); if (!adev->wakeup.flags.valid) |