linux-kernel - Re: [PATCH v1 9/9] of: property: Simplify of_link_to

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Message-ID: <CAGETcx-wz0k13K2fOjTN9RfuMzUPti=UQqY5Mq9XYLK8vudYng@mail.gmail.com>
Date:   Mon, 15 Aug 2022 14:00:57 -0700
From:   Saravana Kannan <saravanak@...gle.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Len Brown <lenb@...nel.org>, Abel Vesa <abel.vesa@...aro.org>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        Sudeep Holla <sudeep.holla@....com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        John Stultz <jstultz@...gle.com>,
        Doug Anderson <dianders@...omium.org>,
        Guenter Roeck <linux@...ck-us.net>, kernel-team@...roid.com,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-acpi@...r.kernel.org
Subject: Re: [PATCH v1 9/9] of: property: Simplify of_link_to_phandle()

On Mon, Aug 15, 2022 at 3:31 AM Tony Lindgren <tony@...mide.com> wrote:
>
> * Saravana Kannan <saravanak@...gle.com> [220813 00:30]:
> > On Fri, Aug 12, 2022 at 2:47 AM Tony Lindgren <tony@...mide.com> wrote:
> > >
> > > Hi,
> > >
> > > * Saravana Kannan <saravanak@...gle.com> [220810 05:54]:
> > > > The driver core now:
> > > > - Has the parent device of a supplier pick up the consumers if the
> > > >   supplier never has a device created for it.
> > > > - Ignores a supplier if the supplier has no parent device and will never
> > > >   be probed by a driver
> > > >
> > > > And already prevents creating a device link with the consumer as a
> > > > supplier of a parent.
> > > >
> > > > So, we no longer need to find the "compatible" node of the supplier or
> > > > do any other checks in of_link_to_phandle(). We simply need to make sure
> > > > that the supplier is available in DT.
> > >
> > > This patch fixes booting for me, so it should be applied as a fix and
> > > tagged with:
> > >
> > > Fixes: 5a46079a9645 ("PM: domains: Delete usage of driver_deferred_probe_check_state()")
> > >
> > > If there are dependencies to the other patches in this series, it might
> > > make sense to revert commit 5a46079a9645 instead.
> >
> > Yes, there are dependencies on the rest of the patches in this series.
> > For linux-next, I think we should pick up this series once we get more
> > Tested-bys.
> >
> >  So if 5a46079a9645 is causing any regression in stable branches, we
> > should pick up the revert series [1] instead of this series we are
> > replying to.
>
> Agreed we should apply the reverts in [1] for v6.0-rc series. At least
> several generations of the TI 32-bit ARM SoCs are failing to boot
> otherwise.

Actually I wasn't clear in my earlier email. I meant to say "releases
branches", as in 5.19.xxx and not "stable branches". So for 5.19.xxx
we'd pick up these reverts.

And for v6.0-rc if my other patch series [1] fixes the issue, I'd
rather apply [1] than this series. Because this series is meant to be
temporary (I'll be reverting this in the future).

-Saravana

[1] - https://lore.kernel.org/lkml/20220810060040.321697-1-saravanak@google.com/