linux-kernel - Re: [PATCH v1 02/13] ACPI: thermal: Collapse trip devices update functions

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Message-ID: <eaf3cef4-628f-8f6c-b77d-c8b2ee62f50b@linaro.org>
Date:   Tue, 26 Sep 2023 23:16:19 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Lukasz Luba <lukasz.luba@....com>
Subject: Re: [PATCH v1 02/13] ACPI: thermal: Collapse trip devices update
 functions

On 26/09/2023 20:04, Rafael J. Wysocki wrote:
> On Tue, Sep 26, 2023 at 7:56 PM Rafael J. Wysocki <rafael@...nel.org> wrote:
>>
>> On Tue, Sep 26, 2023 at 7:18 PM Daniel Lezcano
>> <daniel.lezcano@...aro.org> wrote:
>>>
>>> On 21/09/2023 19:49, Rafael J. Wysocki wrote:
>>>> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>>>>
>>>> In order to reduce code duplication, merge update_passive_devices() and
>>>> update_active_devices() into one function called update_trip_devices()
>>>> that will be used for updating both the passive and active trip points.
>>>>
>>>> No intentional functional impact.
>>>>
>>>> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>>>> ---
>>>>    drivers/acpi/thermal.c |   53 ++++++++++++++++++-------------------------------

[ ... ]

>>>> +     if (index != ACPI_THERMAL_TRIP_PASSIVE) {
>>>> +             method[1] = 'A';
>>>> +             method[2] = 'L';
>>>> +             method[3] = '0' + index;
>>>> +     }
>>>
>>> Could be index > 9 ?
>>
>> I can add a check, but it will never be called with index > 9 anyway.
> 
> To be more precise, update_trip_devices() is called in two places,
> acpi_thermal_init_trip() and acpi_thermal_update_trip_devices().
> 
> Both of these are called either with ACPI_THERMAL_TRIP_PASSIVE passed
> as index, or from a loop over indices between 0 and
> ACPI_THERMAL_MAX_ACTIVE-1 inclusive.

Ok, thanks for clarifying


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