[PATCH v4 1/2] PCI: add AMD PCIe quirk for nvme shutdown opt

[Keith Busch]

On Mon, May 03, 2021 at 08:14:07AM +0100, Christoph Hellwig wrote:
> On Fri, Apr 30, 2021 at 12:50:49PM -0500, Bjorn Helgaas wrote:
> > Patch 2/2 only uses PCI_DEV_FLAGS_AMD_NVME_SIMPLE_SUSPEND in the nvme
> > driver, so AFAICT there is no reason for the PCI core to keep track of
> > the flag for you.
> > 
> > I see below that Christoph suggests it needs to be in the PCI core,
> > but the reason needs to be explained in the commit log.
> 
> As far as I can tell this has nothing to do with NVMe except for the
> fact that right now it mostly hits NVMe as the nvme drivers is one of
> the few drivers not always doing a full device shutdown when the
> system goes into the S3 power state.  But various x86 platforms now
> randomly power done the link in that case.

Right, and the v5 of this series uses a generic name for the PCI quirk
without mentioning "NVME".