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

[Liang, Prike]

[AMD Public Use]

> From: Bjorn Helgaas <helgaas at kernel.org>
> Sent: Monday, May 3, 2021 11:50 PM
> To: Keith Busch <kbusch at kernel.org>
> Cc: Christoph Hellwig <hch at infradead.org>; Liang, Prike
> <Prike.Liang at amd.com>; linux-nvme at lists.infradead.org;
> Chaitanya.Kulkarni at wdc.com; gregkh at linuxfoundation.org;
> stable at vger.kernel.org; Deucher, Alexander
> <Alexander.Deucher at amd.com>; S-k, Shyam-sundar <Shyam-sundar.S-
> k at amd.com>; linux-pci at vger.kernel.org; Rafael J. Wysocki
> <rjw at rjwysocki.net>
> Subject: Re: [PATCH v4 1/2] PCI: add AMD PCIe quirk for nvme shutdown opt
>
> On Mon, May 03, 2021 at 07:57:02AM -0700, Keith Busch wrote:
> > 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".
>
> It'd be nice if somebody would figure out how to cc: linux-pci on these
> patches.
Thank you for your review. Sorry miss that and now linux-pci has been added to the v5 patch.