linux-kernel - Re: [PATCH 02/13] hwmon: convert ntc_thermistor to use devm_thermal_zone_of_sensor

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Date:	Wed, 9 Mar 2016 19:19:39 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Eduardo Valentin <edubezval@...il.com>,
	Rui Zhang <rui.zhang@...el.com>
Cc:	Linux PM <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, lm-sensors@...sensors.org,
	Jean Delvare <jdelvare@...e.com>
Subject: Re: [PATCH 02/13] hwmon: convert ntc_thermistor to use
 devm_thermal_zone_of_sensor_register

On 03/09/2016 01:35 PM, Eduardo Valentin wrote:
> This changes the driver to use the devm_ version
> of thermal_zone_of_sensor_register and cleans
> up the  local points and unregister calls.
>
> Cc: Jean Delvare <jdelvare@...e.com>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: lm-sensors@...sensors.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Eduardo Valentin <edubezval@...il.com>

Acked-by: Guenter Roeck <linux@...ck-us.net>

> ---
>   drivers/hwmon/ntc_thermistor.c | 12 ++++--------
>   1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/hwmon/ntc_thermistor.c b/drivers/hwmon/ntc_thermistor.c
> index feed306..ffc12f1 100644
> --- a/drivers/hwmon/ntc_thermistor.c
> +++ b/drivers/hwmon/ntc_thermistor.c
> @@ -221,7 +221,6 @@ struct ntc_data {
>   	struct device *dev;
>   	int n_comp;
>   	char name[PLATFORM_NAME_SIZE];
> -	struct thermal_zone_device *tz;
>   };
>
>   #if defined(CONFIG_OF) && IS_ENABLED(CONFIG_IIO)
> @@ -539,6 +538,7 @@ static const struct thermal_zone_of_device_ops ntc_of_thermal_ops = {
>
>   static int ntc_thermistor_probe(struct platform_device *pdev)
>   {
> +	struct thermal_zone_device *tz;
>   	const struct of_device_id *of_id =
>   			of_match_device(of_match_ptr(ntc_match), &pdev->dev);
>   	const struct platform_device_id *pdev_id;
> @@ -633,12 +633,10 @@ static int ntc_thermistor_probe(struct platform_device *pdev)
>   	dev_info(&pdev->dev, "Thermistor type: %s successfully probed.\n",
>   								pdev_id->name);
>
> -	data->tz = thermal_zone_of_sensor_register(data->dev, 0, data->dev,
> -						   &ntc_of_thermal_ops);
> -	if (IS_ERR(data->tz)) {
> +	tz = devm_thermal_zone_of_sensor_register(data->dev, 0, data->dev,
> +						  &ntc_of_thermal_ops);
> +	if (IS_ERR(tz))
>   		dev_dbg(&pdev->dev, "Failed to register to thermal fw.\n");
> -		data->tz = NULL;
> -	}
>
>   	return 0;
>   err_after_sysfs:
> @@ -656,8 +654,6 @@ static int ntc_thermistor_remove(struct platform_device *pdev)
>   	sysfs_remove_group(&data->dev->kobj, &ntc_attr_group);
>   	ntc_iio_channel_release(pdata);
>
> -	thermal_zone_of_sensor_unregister(data->dev, data->tz);
> -
>   	return 0;
>   }
>
>