linux-kernel - Re: [PATCH v1] PCI: brcmstb: Fix regression regarding missing PCIe linkup

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Date:   Wed, 25 May 2022 13:13:38 -0400
From:   Jim Quinlan <jim2101024@...il.com>
To:     Cyril Brulebois <kibi@...ian.org>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        linux-pci <linux-pci@...r.kernel.org>,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        James Dutton <james.dutton@...il.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        Jim Quinlan <james.quinlan@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org
Subject: Re: [PATCH v1] PCI: brcmstb: Fix regression regarding missing PCIe linkup

On Tue, May 24, 2022 at 7:56 PM Cyril Brulebois <kibi@...ian.org> wrote:
>
> Hi Jim,
>
> Jim Quinlan <jim2101024@...il.com> (2022-05-24):
> > Yes. One repo did not have this node (Cyril/debina?), one did
> > (https://github.com/raspberrypi/firmware/tree/master/boot).
> > Of course there is nothing wrong with omitting the node; it should
> > have pcie linkup regardless.
>
> I work/debug stuff on Debian systems, but Debian's just shipping what's
> in mainline. Raspberry people maintain their own vendor DTBs.
>
> > Unless you object, I plan on sending you a v2 of my regression fix
> > which will correct the commit message, change the "if (busno == 1)"
> > conditional to only guard the pcie linkup call, and add further
> > comments.
> >
> > I have noted and will also address your other concerns and suggestions
> > in a future patchset as I think it is best that I get my hands on a
> > CM4 board before I submit any more changes.
>
> For the record, I'm still happy to be cc'ed so that I spend time testing
> further patches, be it the short-term regression fix (for inclusion in
> master, but also checking it fixes linux-5.17.y and now linux-5.18.y,
> if stable maintainers would welcome the extra testing), or the future
> patchset.
>
> I can't guarantee you'll have an answer in a few hours like that
> happened during the past few days (during which I prioritized testing
> over anything else so as not to be a blocker in case it could be
> squeezed into v5.18). But I'm still willing to allocate some time to
> make sure the CM4 keeps working, even if you don't get your hands on
> such systems right away.

I really appreciate the help, thank you.  We have ordered a CM4 and I
will be testing on  it prior to sending pullreqs.

Regards,
Jim Quinlan
Broadcom ST


>
>
> Cheers,
> --
> Cyril Brulebois (kibi@...ian.org)            <https://debamax.com/>
> D-I release manager -- Release team member -- Freelance Consultant