Re: [PATCH v3 1/2] gpio: sim: fix an invalid __free() usage

[Bartosz Golaszewski]

On Sun, Sep 17, 2023 at 6:46 PM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> On Sun, 17 Sept 2023 at 02:12, Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> >
> > +               has_line_names = true;
> > +               max_offset = max(line->offset, max_offset);
>
> I really don't understand why you kept this old broken logic.
>
> I sent a much better version of this function that didn't need that
> pointless has_line_names thing or the 'max()' thing, by just making
> the code a lot simpler.
>

Right, it does what it's supposed to after all but IMO it's less
clear, I had to take a second look now to get it. I was wondering if
I'm simply too sleep deprived but no - it's because in your version
the max_offset variable actually holds the value of (max_offset + 1)
which makes the name untrue.

I don't want to bikeshed about it, let me know if my version is
GoodEnough(R) or do you prefer another respin.

Bart

> Whatever.
>
> > +       line_names_size = gpio_sim_get_line_names_size(bank);
> > +       if (line_names_size) {
> > +               line_names = kcalloc(line_names_size, sizeof(*line_names),
> > +                                    GFP_KERNEL);
> > +               if (!line_names)
> > +                       return ERR_PTR(-ENOMEM);
> > +
> > +               gpio_sim_set_line_names(bank, line_names);
> >
> > -       if (line_names)
> >                 properties[prop_idx++] = PROPERTY_ENTRY_STRING_ARRAY_LEN(
> >                                                 "gpio-line-names",
> >                                                 line_names, line_names_size);
> > +       }
>
> But I do like this reorganization.
>
>             Linus