linux-kernel - Re: [PATCH v4 02/30] thermal/sysfs: Do not make get_trip

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Date:   Mon, 26 Sep 2022 14:55:37 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Zhang Rui <rui.zhang@...el.com>, rafael@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Amit Kucheria <amitk@...nel.org>
Subject: Re: [PATCH v4 02/30] thermal/sysfs: Do not make get_trip_hyst
 optional

On 23/09/2022 16:19, Zhang Rui wrote:
> On Wed, 2022-09-21 at 11:42 +0200, Daniel Lezcano wrote:
>> The get_trip_hyst() ops is optional. It results all around the
>> thermal
>> framework code a check against the ops pointer and different action
>> adding more complexity and making the code less readable and
>> understandable.
>>
>> A zero hysteresis value is perfectly valid, so instead of adding more
>> circumvolutions in the code, create unconditionnaly the hysteresis
>> and
>> use the thermal_zone_get_trip() function which returns a zero
>> hysteresis if the get_trip_hyst() is not defined.
> 
> I think an alternative way is to use the .is_visible() callback to make
> this cleanup transparent to userspace.

This would apply for the group not per trip point file, no?


> With this, we can remove the
> 	if (tz->ops->set_trip_hyst)check in create_trip_attrs() as well.
> 
> But you make the cal. :)
> 
> thanks,
> rui
> 
> 


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