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Message-ID: <CACRpkdb0y20JOdmzqMdEZB1_LbSKSY1nOtzhfvyf=eC3o2_p=Q@mail.gmail.com>
Date: Thu, 24 Aug 2023 10:47:17 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Kent Gibson <warthog618@...il.com>, linux-gpio@...r.kernel.org,
linux-kernel@...r.kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [libgpiod v1.6.x][PATCH] tests: mockup: unbind mockup devices
before unloading the module
On Mon, Aug 21, 2023 at 5:33 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> gpio-mockup relies on the GPIO devices being registered in module's __init
> function and them being unregistered in __exit. This works with the GPIO
> subsystem as it only takes a reference to the underlying owner module when
> a GPIO descriptor is requested and not when the GPIO device is
> instantiated.
>
> This behavior may change in the future in the kernel so make the behavior
> of libgpiomockup more correct and have it unbind all mockup devices over
> sysfs before unloading the module.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Yours,
Linus Walleij
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