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>

1 files changed, 1 insertions, 8 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 4b3b29bc7a82..003d112a783d 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -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,