linux-kernel - Re: [PATCH 3/3] thermal/drivers/intel: Use generic trip points for intel_soc_dts

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Message-ID: <beb367d8-dad7-87d9-7872-b81a4d3492ae@linaro.org>
Date:   Tue, 31 Jan 2023 18:03:13 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     srinivas.pandruvada@...ux.intel.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, rui.zhang@...el.com,
        Daniel Lezcano <daniel.lezcano@...nel.org>,
        Amit Kucheria <amitk@...nel.org>
Subject: Re: [PATCH 3/3] thermal/drivers/intel: Use generic trip points for
 intel_soc_dts_iosf


Hi Rafael,


On 26/01/2023 17:47, Rafael J. Wysocki wrote:
> On Wed, Jan 18, 2023 at 7:16 PM Daniel Lezcano
> <daniel.lezcano@...aro.org> wrote:
>>
>> From: Daniel Lezcano <daniel.lezcano@...nel.org>
>>
>> The thermal framework gives the possibility to register the trip
>> points with the thermal zone. When that is done, no get_trip_* ops are
>> needed and they can be removed.
>>
>> Convert ops content logic into generic trip points and register them with the
>> thermal zone.
>>
>> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
>> ---

[ ... ]

>> @@ -173,8 +166,13 @@ static int update_trip_temp(struct intel_soc_dts_sensor_entry *dts,
>>          if (status)
>>                  goto err_restore_te_out;
>>
>> -       dts->trip_types[thres_index] = trip_type;
>> -
>> +       status = get_trip_temp(sensors, thres_index, &temp);
>> +       if (status)
>> +               goto err_restore_te_out;
>> +
>> +       dts->trips[thres_index].type = trip_type;
>> +       dts->trips[thres_index].temperature = temp;
> 
> This change doesn't look correct to me, because this function takes
> temp as an argument and it is used to populate the trip with it at
> least in some cases.
> 
> Why should temp be overwritten here?

You are correct. This is wrong.

I think we should call get_trip_temp() before calling update_trip_temp() 
instead of passing a zero temperature parameter


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