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Diffstat (limited to 'drivers/pci/pci-acpi.c')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 0c02d500158f..3f40f951a6cd 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -944,6 +944,16 @@ static bool acpi_pci_bridge_d3(struct pci_dev *dev) if (!dev->is_hotplug_bridge) return false; + /* Assume D3 support if the bridge is power-manageable by ACPI. */ + adev = ACPI_COMPANION(&dev->dev); + if (!adev && !pci_dev_is_added(dev)) { + adev = acpi_pci_find_companion(&dev->dev); + ACPI_COMPANION_SET(&dev->dev, adev); + } + + if (adev && acpi_device_power_manageable(adev)) + return true; + /* * Look for a special _DSD property for the root port and if it * is set we know the hierarchy behind it supports D3 just fine. |