linux-kernel - Re: [PATCH v2 08/10] pinctrl: sppctl: use gpiochip_dup_line

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Date:   Thu, 30 Nov 2023 18:37:43 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.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 v2 08/10] pinctrl: sppctl: use gpiochip_dup_line_label()

On Thu, Nov 30, 2023 at 02:46:28PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> Use the new gpiochip_dup_line_label() helper to safely retrieve the
> descriptor label.

...

>  	for (i = 0; i < chip->ngpio; i++) {
> -		label = gpiochip_is_requested(chip, i);
> -		if (!label)
> -			label = "";
> +		char *label __free(kfree) = gpiochip_dup_line_label(chip, i);
> +		if (IS_ERR(label))
> +			continue;
>  
>  		seq_printf(s, " gpio-%03d (%-16.16s | %-16.16s)", i + chip->base,
> -			   chip->names[i], label);
> +			   chip->names[i], label ?: "");

So, as it's non-ABI change, we still can use "reserved" word here as well
("Unrequested" or whatever.)

-- 
With Best Regards,
Andy Shevchenko