Re: [PATCH] Clean up thermal API

[Pavel Machek]

Hi!

> The thermal layer passes temperatures around as strings. This is fine 
> for sysfs, but makes it hard to use them for other purposes in-kernel. 
> Change them to longs and do the string conversion in the sysfs-specific 
> code.
> 
> Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>

Looks mostly ok to me.


> -static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
> +static int thermal_get_temp(struct thermal_zone_device *thermal, 
> +			    unsigned long *temp)

Hmm, it would be cool to create typedef unsigned long milicelsius, so
that this is self-documenting and possibly sparse-checkable.



> @@ -898,7 +899,8 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
>  	if (result)
>  		return result;
>  
> -	return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature));
> +	*temp = KELVIN_TO_MILLICELSIUS(tz->temperature);
> +	return 0;
>  }

Hmmm, if we did interface in miliKelvins, we would be able to do
-errno trick :-).


>  	if (!tz->ops->get_temp)
>  		return -EPERM;
>  
> -	return tz->ops->get_temp(tz, buf);
> +	ret = tz->ops->get_temp(tz,&temperature);

missing space after , .

> +	if (ret)
> +		return ret;
> +
> +	return sprintf(buf,"%ld\n",temperature);
>  }

More mising spaces.

> +	if (ret)
> +		return ret;
> +
> +	return sprintf (buf, "%ld\n", temperature);
>  }

And some extra spaces here: 'sprintf('.

							Pavel
-- 
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