linux-kernel - Re: [PATCH] gpiolib: don't bail out if get_direction() fails in gpiochip_add

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Message-ID: <Z7ckwrBUgqLyEBSB@finisterre.sirena.org.uk>
Date: Thu, 20 Feb 2025 12:49:06 +0000
From: Mark Brown <broonie@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH] gpiolib: don't bail out if get_direction() fails in
 gpiochip_add_data()

On Wed, Feb 19, 2025 at 03:43:56PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> Since commit 9d846b1aebbe ("gpiolib: check the return value of
> gpio_chip::get_direction()") we check the return value of the
> get_direction() callback as per its API contract. Some drivers have been
> observed to fail to register now as they may call get_direction() in
> gpiochip_add_data() in contexts where it has always silently failed.
> Until we audit all drivers, replace the bail-out to a kernel log
> warning.

For at least one of the affected boards:

Tested-by: Mark Brown <broonie@...nel.org>
Reviewed-by: Mark Brown <broonie@...nel.org>

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