From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux PM <linux-pm@vger.kernel.org>,
"Zhang, Rui" <rui.zhang@intel.com>,
Amit Kucheria <amitk@kernel.org>
Subject: Re: [PATCH v5 03/30] thermal/core: Add a generic thermal_zone_set_trip() function
Date: Tue, 27 Sep 2022 14:20:39 +0200 [thread overview]
Message-ID: <584a1927-0713-4a6d-a7a6-94bdda30dc0d@linaro.org> (raw)
In-Reply-To: <CAJZ5v0gATxtX5RW0oHbhT_hjUoEC3V39tQpJi74eg8iXhrwZKg@mail.gmail.com>
On 27/09/2022 12:38, Rafael J. Wysocki wrote:
> On Tue, Sep 27, 2022 at 12:11 AM Daniel Lezcano
> <daniel.lezcano@linaro.org> wrote:
>>
>> On 26/09/2022 21:25, Rafael J. Wysocki wrote:
>>
>> [ ... ]
>>
>>>> + if ((t.temperature != trip->temperature) && tz->ops->set_trip_temp) {
>>>
>>> The inner parens are not needed here and below.
>>>
>>>> +
>>>
>>> And the extra empty line is not needed here (and below) too IMO.
>>>
>>>> + ret = tz->ops->set_trip_temp(tz, trip_id, trip->temperature);
>>>> + if (ret)
>>>> + goto out;
>>>> + }
>>>
>>
>> Without the parens, the following happens:
>>
>>
>> warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
>> 1229 | if ((t.temperature != trip->temperature) &&
>> tz->ops->set_trip_temp)
>> | ^~
>> note: ...this statement, but the latter is misleadingly indented as if
>> it were guarded by the ‘if’
>> 1231 | if (ret)
>> | ^~
>
> This is about indentation, though, so it looks like white space is
> mangled somehow.
>
> As a matter of correctness, the inner parens are not needed.
Oh, actually I did a confusion with the 'brackets', you meant:
(t.temperature != trip->temperature && tz->ops->set_trip_temp)
right ?
>>>> + if ((t.hysteresis != trip->hysteresis) && tz->ops->set_trip_hyst) {
>>>> +
>>>> + ret = tz->ops->set_trip_hyst(tz, trip_id, trip->hysteresis);
>>>> + if (ret)
>>>> + goto out;
>>>> + }
>>>> +
>>>> + if (((t.temperature != trip->temperature) ||
>>>> + (t.hysteresis != trip->hysteresis)) && tz->trips)
>>>> + tz->trips[trip_id] = *trip;
>>>
>>> I would write this as
>>>
>>> if (tz->trips && (t.temperature != trip->temperature || t.hysteresis
>>> != trip->hysteresis))
>>> tz->trips[trip_id] = *trip;
>>
>> Ok, sure
>>
>>> But
>>>
>>> 1. Do we want to copy the trip type here too?
>>
>> The function thermal_zone_set_trip() is called from thermal_sysfs.c, it
>> is the unique call site. However, I think it is a good idea to check the
>> type of the trip point is not changed, even if it is not possible with
>> the actual code.
>>
>>> 2. If tz->trips is set, do we still want to invoke ->set_trip_temp()
>>> or ->set_trip_hyst() if they are present?
>>
>> No but there are bogus drivers setting the interrupt with these ops
>> instead of using the set_trips ops (eg. [1][2][3]). So in order to keep
>> those working ATM, I'm keeping them and when all the drivers will be
>> changed, I'll wipe out the set_trip_* ops from everywhere.
>
> Do those drivers set tz->trips? If not, the tz->trips check can go
> before the ops ones.
Unfortunately some are doing that, like the tegra's soctherm driver
>> [1] drivers/thermal/samsung/exynos_tmu.c
>> [2] drivers/thermal/qcom/qcom-spmi-temp-alarm.c
>> [3] drivers/thermal/imx_thermal.c
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next prev parent reply other threads:[~2022-09-27 12:21 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-26 14:05 [PATCH v5 00/30] Rework the trip points creation Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 01/30] thermal/core: Add a generic thermal_zone_get_trip() function Daniel Lezcano
2022-09-26 19:01 ` Rafael J. Wysocki
2022-09-26 14:05 ` [PATCH v5 02/30] thermal/sysfs: Do not make get_trip_hyst optional Daniel Lezcano
2022-09-26 19:16 ` Rafael J. Wysocki
2022-09-26 14:05 ` [PATCH v5 03/30] thermal/core: Add a generic thermal_zone_set_trip() function Daniel Lezcano
2022-09-26 19:25 ` Rafael J. Wysocki
2022-09-26 22:11 ` Daniel Lezcano
2022-09-27 10:38 ` Rafael J. Wysocki
2022-09-27 12:20 ` Daniel Lezcano [this message]
2022-09-26 14:05 ` [PATCH v5 04/30] thermal/core: Add a generic thermal_zone_get_crit_temp() function Daniel Lezcano
2022-09-26 19:27 ` Rafael J. Wysocki
2022-09-26 14:05 ` [PATCH v5 05/30] thermal/core/governors: Use thermal_zone_get_trip() instead of ops functions Daniel Lezcano
2022-09-26 19:34 ` Rafael J. Wysocki
2022-09-26 22:15 ` Daniel Lezcano
2022-09-27 11:08 ` Rafael J. Wysocki
2022-09-26 14:05 ` [PATCH v5 06/30] thermal/of: Use generic thermal_zone_get_trip() function Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 07/30] thermal/of: Remove unused functions Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 08/30] thermal/drivers/exynos: Use generic thermal_zone_get_trip() function Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 09/30] thermal/drivers/exynos: of_thermal_get_ntrips() Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 10/30] thermal/drivers/exynos: Replace of_thermal_is_trip_valid() by thermal_zone_get_trip() Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 11/30] thermal/drivers/tegra: Use generic thermal_zone_get_trip() function Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 12/30] thermal/drivers/uniphier: " Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 13/30] thermal/drivers/hisi: " Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 14/30] thermal/drivers/qcom: " Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 15/30] thermal/drivers/armada: " Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 16/30] thermal/drivers/rcar_gen3: Use the generic function to get the number of trips Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 17/30] thermal/of: Remove of_thermal_get_ntrips() Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 18/30] thermal/of: Remove of_thermal_is_trip_valid() Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 19/30] thermal/of: Remove of_thermal_set_trip_hyst() Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 20/30] thermal/of: Remove of_thermal_get_crit_temp() Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 21/30] thermal/drivers/st: Use generic trip points Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 22/30] thermal/drivers/imx: Use generic thermal_zone_get_trip() function Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 23/30] thermal/drivers/rcar: " Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 24/30] thermal/drivers/broadcom: " Daniel Lezcano
2022-09-26 14:05 ` [PATCH v5 25/30] thermal/drivers/da9062: " Daniel Lezcano
2022-09-26 14:06 ` [PATCH v5 26/30] thermal/drivers/ti: Remove unused macros ti_thermal_get_trip_value() / ti_thermal_trip_is_valid() Daniel Lezcano
2022-09-26 14:06 ` [PATCH v5 27/30] thermal/drivers/acerhdf: Use generic thermal_zone_get_trip() function Daniel Lezcano
2022-09-26 14:06 ` [PATCH v5 28/30] thermal/drivers/cxgb4: " Daniel Lezcano
2022-09-26 14:06 ` [PATCH v5 29/30] thermal/intel/int340x: Replace parameter to simplify Daniel Lezcano
2022-09-26 17:05 ` Nathan Chancellor
2022-09-26 21:33 ` Daniel Lezcano
2022-09-26 14:06 ` [PATCH v5 30/30] thermal/drivers/intel: Use generic thermal_zone_get_trip() function Daniel Lezcano
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