linux-kernel - Re: [PATCH v2 2/5] thermal: core: Get thermal zone by id

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Date:   Tue, 30 Jun 2020 23:16:06 +0800
From:   Zhang Rui <rui.zhang@...el.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     srinivas.pandruvada@...ux.intel.com, rkumbako@...eaurora.org,
        amit.kucheria@...aro.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/5] thermal: core: Get thermal zone by id

On Thu, 2020-06-25 at 16:45 +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@...aro.org>
> ---
>  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 e2f8d2550ecd..58c95aeafb7f 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -662,6 +662,20 @@ 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;
> +}
> +

IMO, this one, as well as thermal_zone_get_zone_by_name(), should all
be in thermal_helper.c

thanks,
rui
>  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 bb8f8aee79eb..7e8f45db6bbf 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];