Re: [PATCH v4 2/4] thermal: core: Get thermal zone by id

[Zhang Rui <rui.zhang@intel.com>]

On Mon, 2020-07-06 at 12:55 +0200, Daniel Lezcano wrote:
> The next patch will introduce the generic netlink protocol to handle
> events, sampling and command from the thermal framework. In order to
> deal with the thermal zone, it uses its unique identifier to
> characterize it in the message. Passing an integer is more efficient
> than passing an entire string.
> 
> This change provides a function returning back a thermal zone pointer
> corresponding to the identifier passed as parameter.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>

Acked-by: Zhang Rui <rui.zhang@intel.com>
> ---
>  drivers/thermal/thermal_core.c | 14 ++++++++++++++
>  drivers/thermal/thermal_core.h |  2 ++
>  2 files changed, 16 insertions(+)
> 
> diff --git a/drivers/thermal/thermal_core.c
> b/drivers/thermal/thermal_core.c
> index 9caaa0b6d662..5fae1621fb01 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -668,6 +668,20 @@ int for_each_thermal_zone(int (*cb)(struct
> thermal_zone_device *, void *),
>  	return ret;
>  }
>  
> +struct thermal_zone_device *thermal_zone_get_by_id(int id)
> +{
> +	struct thermal_zone_device *tz = NULL;
> +
> +	mutex_lock(&thermal_list_lock);
> +	list_for_each_entry(tz, &thermal_tz_list, node) {
> +		if (tz->id == id)
> +			break;
> +	}
> +	mutex_unlock(&thermal_list_lock);
> +
> +	return tz;
> +}
> +
>  void thermal_zone_device_unbind_exception(struct thermal_zone_device
> *tz,
>  					  const char *cdev_type, size_t
> size)
>  {
> diff --git a/drivers/thermal/thermal_core.h
> b/drivers/thermal/thermal_core.h
> index 71d88dac0791..4f8389efaa62 100644
> --- a/drivers/thermal/thermal_core.h
> +++ b/drivers/thermal/thermal_core.h
> @@ -50,6 +50,8 @@ int for_each_thermal_cooling_device(int
> (*cb)(struct thermal_cooling_device *,
>  int for_each_thermal_governor(int (*cb)(struct thermal_governor *,
> void *),
>  			      void *thermal_governor);
>  
> +struct thermal_zone_device *thermal_zone_get_by_id(int id);
> +
>  struct thermal_attr {
>  	struct device_attribute attr;
>  	char name[THERMAL_NAME_LENGTH];