linux-kernel - Re: [PATCH v1 5/8] ACPI: x86: use acpi_dev_uid_match() for matching

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Message-ID: <CAJZ5v0gqFgkhPHudqYUdg8ZgbEtF0Jf1ATbYACYEq3fNyaDW2w@mail.gmail.com>
Date:   Fri, 20 Oct 2023 19:05:37 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Raag Jadav <raag.jadav@...el.com>, rafael@...nel.org,
        len.brown@...el.com, robert.moore@...el.com,
        mika.westerberg@...ux.intel.com, mark.rutland@....com,
        will@...nel.org, linux@...ck-us.net, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        acpica-devel@...ts.linuxfoundation.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-hwmon@...r.kernel.org,
        mallikarjunappa.sangannavar@...el.com, bala.senthil@...el.com
Subject: Re: [PATCH v1 5/8] ACPI: x86: use acpi_dev_uid_match() for matching _UID

On Fri, Oct 20, 2023 at 12:38 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Fri, Oct 20, 2023 at 02:17:29PM +0530, Raag Jadav wrote:
> > Convert manual _UID references to use standard ACPI helpers.
>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>
> ...
>
> > -                     if (!adev->pnp.unique_id ||
> > -                         strcmp(adev->pnp.unique_id, override_status_ids[i].uid))
> > +                     if (!acpi_dev_uid_match(adev, override_status_ids[i].uid))
>
> The check for NULL argument inside that API does not affect the behaviour as
> otherwise it will be a crash with the current implementation.

What current implementation do you mean, exactly?