[PATCH v6] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges

[Mika Westerberg]

On Thu, Mar 05, 2020 at 05:11:57PM +0100, Karol Herbst wrote:
> On Wed, Mar 4, 2020 at 10:33 AM Mika Westerberg
> <mika.westerberg at intel.com> wrote:
> >
> > Hi,
> >
> > On Tue, Mar 03, 2020 at 11:10:52AM +0100, Karol Herbst wrote:
> > > Fixes state transitions of Nvidia Pascal GPUs from D3cold into higher device
> > > states.
> >
> > I think it is good to explain bit more here why this fix is needed.
> >
> 
> is something like this fine?
> 
> Fixes the infamous 'runpm' bug many users are facing on Laptops with Nvidia
> Pascal GPUs by skipping PCI power state changes on the GPU.

I would open up 'runpm' -> runtime PM.

> It's still unknown why this issue exists, but this is a reliable workaround
> and solves a very annoying issue for user having to choose between a
> crashing kernel or higher power consumption of their Laptops.

Also I think it would be good to include a short log snippet how this
manifests and in what kind of scenario it happens.