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

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Message-ID: <CAMRc=MfoJ+NFNFand8K7DVZP3Qdz=kp5+XBG_aAJ7-Twq8wvZA@mail.gmail.com>
Date:   Thu, 30 Nov 2023 18:43:13 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
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 5:37 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> 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.)
>

See my other comment regarding the changes in output.

Bart

> --
> With Best Regards,
> Andy Shevchenko
>
>