linux-kernel - Re: [PATCH] PCI: Add missing link delays required by the PCIe spec

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Message-ID: <20190823071037.GP19908@lahna.fi.intel.com>
Date:   Fri, 23 Aug 2019 10:10:37 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Matthias Andree <matthias.andree@....de>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, Lukas Wunner <lukas@...ner.de>,
        Keith Busch <keith.busch@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Alexandru Gagniuc <mr.nuke.me@...il.com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Paul Menzel <pmenzel@...gen.mpg.de>,
        Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>,
        Justin Forbes <jmforbes@...uxtx.org>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: Add missing link delays required by the PCIe spec

On Thu, Aug 22, 2019 at 08:29:09PM +0200, Matthias Andree wrote:
> Am 21.08.19 um 14:45 schrieb Mika Westerberg:
> > Hi all,
> >
> > As the changelog says this is reworked version that tries to avoid reported
> > issues while at the same time fix the missing delays so we can get ICL
> > systems and at least the one system with Titan Ridge controller working
> > properly.
> >
> > @Matthias, @Paul and @Nicholas: it would be great if you could try the
> > patch on top of v5.4-rc5+ and verify that it does not cause any issues on
> > your systems.
> >
> >  drivers/pci/pci-driver.c |  19 ++++++
> >  drivers/pci/pci.c        | 127 ++++++++++++++++++++++++++++++++++++---
> >  drivers/pci/pci.h        |   1 +
> >  3 files changed, 137 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
> > index a8124e47bf6e..9aec78ed8907 100644
> 
> ...
> 
> Mika, Bjorn, Rafael,
> 
> quick smoke test, this test applied with git-am on top
> v5.3-rc5-149-gbb7ba8069de9, reboot, suspend, wake, suspend, wake,
> hibernate, wake, looks good to me. The top of git log --pretty-short is
> shown below.

Thanks for testing!

> Couldn't test on v5.4-rc5 though as I've handed off my time machine for
> repairs,
> I seem to recall they said something about the flux compensator.

:)