Commit bad7dcd9 authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Bjorn Helgaas
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ACPI/PCI: Pay attention to device-specific _PXM node values

The ACPI specification allows you to provide _PXM entries for devices based
on their location on a particular bus.  Let us use that if it is provided
rather than just assuming it makes sense to put the device into the
proximity domain of the root.

An example DSDT entry that will supply this is:

  Device (PCI2)
    Name (_HID, "PNP0A08") // PCI Express Root Bridge
    Name (_CID, "PNP0A03") // Compatible PCI Root Bridge
    Name(_SEG, 2) // Segment of this Root complex
    Name(_BBN, 0xF8) // Base Bus Number
    Name(_CCA, 1)
    Method (_PXM, 0, NotSerialized) {

    Device (BRI0) {
      Name (_HID, "19E51610")
      Name (_ADR, 0)
      Name (_BBN, 0xF9)
      Device (CAR0) {
        Name (_HID, "97109912")
        Name (_ADR, 0)
        Method (_PXM, 0, NotSerialized) {
Signed-off-by: default avatarJonathan Cameron <>
Signed-off-by: default avatarBjorn Helgaas <>
parent d193631b
......@@ -751,10 +751,15 @@ 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)
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_add_pm_notifier(adev, pci_dev);
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