Re: [GIT PULL] Thermal management updates for v4.17-rc1

[Daniel Lezcano]

On 13/04/2018 10:55, Bartlomiej Zolnierkiewicz wrote:
> On Friday, April 13, 2018 01:39:05 PM Zhang Rui wrote:
>> Hi, Eduardo,
>>
>> On å, 2018-04-12 at 21:08 -0700, Eduardo Valentin wrote:
>>> Hello,
>>>
>>> On Thu, Apr 12, 2018 at 09:55:19AM -0700, Linus Torvalds wrote:
>>>>
>>>> On Wed, Apr 11, 2018 at 10:08 PM, Zhang Rui <rui.zhang@xxxxxxxxx>
>>>> wrote:
>>>>>
>>>>>
>>>>> could you please illustrate me what the kconfig & warning is?
>>>> Just "make allmodconfig" and the warning is about a uninitialized
>>>> variable.
>>>>
>>>> Line 304 in drivers/thermal/samsung/exynos_tmu.c if my shell
>>>> history
>>>> is to be believed.
>>>>
>>>>                 Linus
>>> Yeah, this has also passed my local compilation error. Somehow my
>>> gcc4.9
>>> is not catching it. Using an older gcc (gcc4.6) does catch it.
>>>
>>> Anyways, given that the conversion functions are written to cover
>>> for unexpected cal_type, the right way of fixing this is to rewrite
>>> the conversion functions to allow for returning error codes and
>>> adjusting the callers as expected.
>>>
>>> Rui, bzolnier, please consider the following fix:
>>>
>> as it is late in this merge window, I'd prefer to
>> 1. drop all the thermal-soc material in the first pull request which I
>> will send out soon.
>> 2. you can prepare another pull request containing the thermal-soc
>> materials except the exynos fixes
>> 3. exynos fixes with the problem solved can be queued for -rc2 or
>> later.
> 
> Could you please just merge the obvious fix from Arnd instead?
> 
> [ it was posted two weeks ago and ACKed by me ]
> 
> https://patchwork.kernel.org/patch/10313313/

I'm not sure these are correct fixes.

The change 480b5bfc16e1 tells:

"There should be no functional changes caused by this patch."

but the fix above returns 0 as a default value instead of '50' or '25'
for the 5440 and that impacts the threshold etc ...

IMO, the correct fix would be to define a default value '50', override
it at init time to '25' if it is a 5440. And then the variable 'temp'
and 'temp_code' get this value in the default case.




> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
> 


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