Re: [PATCH v2 3/5] thermal: devfreq_cooling: add new registration functions with Energy Model

[Lukasz Luba <lukasz.luba@arm.com>]

Hi Ionela,

On 12/2/20 10:24 AM, Ionela Voinescu wrote:
> Hi Lukasz,
> 
> On Wednesday 18 Nov 2020 at 12:03:56 (+0000), Lukasz Luba wrote:

[snip]

>> +	struct device_node *np = NULL;

[snip]

>> +
>> +	if (dev->of_node)
>> +		np = of_node_get(dev->of_node);
>> +
> 
> Should np be checked before use? I'm not sure if it's better to do the
> assign first and then the check on np before use. It depends on the
> consequences of passing a NULL node pointer later on.

The np is actually dev->of_node (or left NULL, as set at the begging).
The only meaning of the line above is to increment the counter and then
decrement if CONFIG_OF_DYNAMIC was used.
The devfreq_cooling_register() has np = NULL and the registration can
handle it, so we should be OK here as well.

> 
>> +	cdev = of_devfreq_cooling_register_power(np, df, dfc_power);
>> +
>> +	if (np)
>> +		of_node_put(np);
>> +

[snip]

>>
> 
> Otherwise it looks good to me:
> 
> Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>

Thank you for the review.

Regards,
Lukasz

> 
> Ionela.
>