https://bugzilla.kernel.org/show_bug.cgi?id=209141
Bug ID: 209141
Summary: DPC/AER kernel message is misleading in FW first mode
Product: ACPI
Version: 2.5
Kernel Version: 5.8.0-rc1
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Hotplug
Assignee: [email protected]
Reporter: [email protected]
Regression: No
There are issues in how the OS advertises control of DPC and AER.
In firmware controlled DPC mode, the kernel log shows:
[ 0.199999] acpi PNP0A08:01: _OSC: platform does not support [SHPCHotplug
AER LTR]
[ 0.200118] acpi PNP0A08:01: _OSC: OS now controls [PCIeHotplug PME
PCIeCapability DPC]
There are two problems with the above.
1) In line one, the OS log states the platform does not support AER. However,
the platform does support AER. This kernel log statement is incorrect.
2) In line two, the OS log states the OS now controls DPC. This is not correct
as the firmware owns/controls both DPC and AER.
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