Re: [PATCH v1 12/16] platform/x86/thinkpad_acpi: Use acpi_dev_for_each_child()

[Rafael J. Wysocki]

On Thu, Jun 9, 2022 at 5:49 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>
> On Thu, Jun 09, 2022 at 04:09:45PM +0200, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> >
> > Instead of walking the list of children of an ACPI device directly,
> > use acpi_dev_for_each_child() to carry out an action for all of
> > the given ACPI device's children.
>
> ...
>
> > +     rc = acpi_dev_for_each_child(device, tpacpi_evaluate_bcl, NULL);
> > +     if (rc > 0)
> > +             return rc;
> >
> > +     return 0;
>
> It can be simply 'return acpi_dev_for_each_child();', no?

It can.

> AFAICS the caller is prepared for negative returns.

It will not return negative though unless the ACPI tables are horribly broken.