On Wed, Mar 14, 2018 at 12:41 PM, Mika Westerberg
<mika.westerberg@xxxxxxxxxxxxxxx> wrote:
> Commit eed85ff4c0da ("PCI/DPC: Enable DPC only if AER is available")
> made DPC control dependent whether AER is enabled in the OS. However, it
> does not take into account situations where BIOS has not given OS
> control of AER:
>
> acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
> acpi PNP0A08:00: _OSC: platform does not support [AER]
> acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug PME PCIeCapability]
>
> I think here it is better not to enable DPC even if the capability is
> available because then it would be against what "Determination of DPC
> Control" note in PCIe 4.0 sec 6.1.10 recommends.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
This may clash with the recent PCIe ports initialization rework from
Bjorn, please double check.
