linux-kernel - Re: [PATCH v4 3/8] gpio: cdev: go back to storing debounce period in the GPIO descriptor

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Message-ID: <20241017124418.GA221864@rigel>
Date: Thu, 17 Oct 2024 20:44:18 +0800
From: Kent Gibson <warthog618@...il.com>
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>
Subject: Re: [PATCH v4 3/8] gpio: cdev: go back to storing debounce period in
 the GPIO descriptor

On Thu, Oct 17, 2024 at 10:14:11AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> @@ -1047,7 +925,7 @@ static int debounce_setup(struct line *line, unsigned int debounce_period_us)
>  	/* try hardware */
>  	ret = gpiod_set_debounce(line->desc, debounce_period_us);
>  	if (!ret) {
> -		line_set_debounce_period(line, debounce_period_us);
> +		WRITE_ONCE(line->desc->debounce_period_us, debounce_period_us);
>  		return ret;
>  	}

Not related to this change, but this check looks redundant to me - the same
is performed where debounce_setup() is called.

Want a patch to remove it?

Cheers,
Kent.