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

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Date:   Wed, 15 Nov 2023 03:42:22 +0200
From:   andy.shevchenko@...il.com
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
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

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?

> 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