linux-kernel - Re: selftests: gpio: crash on arm64

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Message-ID: <CA+G9fYujHuwn_AFDeFHbt0DMx7A63fjLR25aX7pkoMcVmmxbog@mail.gmail.com>
Date:   Wed, 15 Nov 2023 21:07:32 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     andy.shevchenko@...il.com
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
        Arnd Bergmann <arnd@...db.de>, Shuah Khan <shuah@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Pengfei Xu <pengfei.xu@...el.com>, yi1.lai@...el.com,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: selftests: gpio: crash on arm64

On Wed, 15 Nov 2023 at 07:12, <andy.shevchenko@...il.com> wrote:
>
> Tue, Nov 07, 2023 at 07:21:32PM +0530, Naresh Kamboju kirjoitti:
> > On Tue, 20 Jun 2023 at 22:11, Andy Shevchenko
> > <andriy.shevchenko@...ux.intel.com> wrote:
> > > On Tue, Apr 11, 2023 at 10:57:28AM +0200, Linus Walleij wrote:
> > > > On Mon, Apr 10, 2023 at 11:16 AM Naresh Kamboju
> > > > <naresh.kamboju@...aro.org> wrote:
>
> ...
>
> > > > Add a pr_info() devm_gpio_chip_release() in drivers/gpio/gpiolib-devres.c
> > > > and see if the callback is even called. I think this could be the
> > > > problem: if that isn't cleaned up, there will be dangling references.
> > >
> > > Side note: Since we have devres tracepoints, your patch seems an overkill :-)
> > > Just enable devres tracepoints and filter out by the function name. I believe
> > > that should work.
> >
> > Since I have been tracking open issues on the stable-rc kernel,
> > The reported problem on stable-rc linux.6.3.y has been solved
> > on the stable-rc linux.6.6.y branch.
> >
> > Thanks for fixing this reported issue.
> >
> > Upstream links about this fix and discussion,
>
> I'm a bit lost. Is the [3] fixed? Is the fix the below mentioned commit?

As per my understanding on this,
The reported issue has been fixed with the below commit.

>
> > Commit daecca4b8433
> > gpiolib: Do not alter GPIO chip fwnode member
> >
> > [1] https://lore.kernel.org/linux-gpio/20230703142308.5772-4-andriy.shevchenko@linux.intel.com/
> > [2] https://lore.kernel.org/linux-gpio/CAMRc=MfFEBSeJ78NO7XeuzAMJ0KezEPAYWsWnFXXaRyQPAf3dA@mail.gmail.com/
> > [3] https://lore.kernel.org/linux-gpio/CA+G9fYv94gx8+-JMzbmQaue3q3y6QdBmsGUCdD-26X5XavL3Ag@mail.gmail.com/
>
> --
> With Best Regards,
> Andy Shevchenko

- Naresh