Re: [PATCH v4] pci: Add broken-GPE quirk for some Lenovo Legions with Nvidia GPUs

[sashiko-bot@kernel.org]

> From: Lyude Paul <lyude@redhat.com>
> 
> On certain Lenovo Legion devices (including the 16APH8, 16AHP9, and
> 15AHP9), the firmware appears to enjoy firing a GPE on the parent PCIe
> port of the nvidia GPU very shortly after the GPU enters D3Cold. This means
> that every time the GPU is runtime suspended, ACPI firmware immediately
> wakes up its parent PCIe port, which then wakes up the GPU. Once it falls
> asleep again, the cycle repeats.
> 
> Note, this bug doesn't require Nvidia's driver. It happens on nouveau and
> nova as well, and it even seems possible for this to happen without any
> driver loaded.
> 
> This seems to simply be a bug. Luckily, there is nothing that we actually
> need ACPI wakeup events for on the GPU. Events such as display connector
> hotplug events in D3Cold come through as ACPI_VIDEO events which aren't
> affected by this quirk.
> 
> Reported-by: Ryan Brue <ryanbrue.dev@gmail.com>
> Link: https://github.com/NVIDIA/open-gpu-kernel-modules/issues/905
> Co-developed-by: Ryan Brue <ryanbrue.dev@gmail.com>
> Signed-off-by: Ryan Brue <ryanbrue.dev@gmail.com>
> Signed-off-by: Lyude Paul <lyude@redhat.com>

Sashiko has reviewed this patch and found no issues.

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