Re: [PATCH v3 19/24] gpio: remove unnecessary checks from gpiod_to_chip()

[Bartosz Golaszewski <brgl@xxxxxxxx>]

On Thu, Feb 8, 2024 at 6:39 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>
> On Thu, Feb 08, 2024 at 10:59:15AM +0100, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> >
> > We don't need to check the gdev pointer in struct gpio_desc - it's
> > always assigned and never cleared. It's also pointless to check
> > gdev->chip before we actually serialize access to it.
>
> ...
>
> >  struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)
> >  {
> > -     if (!desc || !desc->gdev)
> > +     if (!desc)
>
> Wondering if it makes sense to align with the below and use IS_ERR_OR_NULL() check.
>

Nah, it's not supposed to be used with optional GPIOs anyway as it's
not a consumer facing API.

> >               return NULL;
> >       return desc->gdev->chip;
>
> ...
>
> > -     if (!desc || IS_ERR(desc) || !desc->gdev || !desc->gdev->chip)
> > +     if (!desc || IS_ERR(desc))
>
> IS_ERR_OR_NULL()
>

Ah, good point. It's a small nit though so I'll fix it when applying
barring some major objections for the rest.

Bart

> >               return -EINVAL;
> >
> >       gc = desc->gdev->chip;
>
> --
> With Best Regards,
> Andy Shevchenko
>
>