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Message-ID: <20150610172949.GA4668@localhost>
Date: Wed, 10 Jun 2015 19:29:49 +0200
From: Johan Hovold <johan@...nel.org>
To: Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Alexandre Courbot <gnurou@...il.com>,
linux-gpio <linux-gpio@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Patrick Titiano <ptitiano@...libre.com>,
Benoit Cousson <bcousson@...libre.com>
Subject: Re: [PATCH] gpiolib: unexport requested gpios on gpiochip removal
Hi Bartosz,
On Wed, Jun 10, 2015 at 04:34:21PM +0200, Bartosz Golaszewski wrote:
> When a GPIO expander device is removed - e.g. via i2c-adapter
> new_device/delete_device interface - with some GPIOs still requested,
> gpiochip_remove() function will emit a warning but remove the chip
> anyway.
>
> If we then reinstantiate this device and try to export any of the GPIOs
> still requested on gpiochip deletion the following warning will be
> emitted:
For GPIOs exported through sysfs, this has already been fixed by commit
483d82110879 ("gpio: sysfs: fix memory leaks and device hotplug"), which
has also been backported to stable.
Thanks,
Johan
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