Commit c6285fc5 authored Aug 29, 2014 by Bjorn Helgaas

PCI: Apply _HPP settings to PCIe devices as well as PCI and PCI-X



The ACPI _HPP method was defined before PCIe existed, so its documentation
only mentions PCI.  The _HPX Type 0 setting record is essentially identical
to _HPP, but the spec (ACPI rev 5.0, sec 6.2.8.1) says it should be applied
to PCI, PCI-X, and PCIe devices, with settings being ignored if they are
not applicable.

Some platforms with both conventional PCI and PCIe devices provide only
_HPP (not _HPX), so treat _HPP the same way as an _HPX Type 0 record and
apply it to PCIe devices as well as PCI and PCI-X.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>

parent fbfa398b

drivers/pci/probe.c

+1 −8

Original line number	Diff line number	Diff line
		@@ -1249,15 +1249,8 @@ static void program_hpp_type0(struct pci_dev dev, struct hpp_type0 hpp)
		{
		u16 pci_cmd, pci_bctl;

		if (!hpp) {
		/*
		* Perhaps we should use default settings for PCIe, but
		* pciehp didn't, so we won't either.
		*/
		if (pci_is_pcie(dev))
		return;
		if (!hpp)
		hpp = &pci_default_type0;
		}

		if (hpp->revision > 1) {
		dev_warn(&dev->dev,