linux-kernel - RE: [PATCH V3] thermal: imx: Add missing of_node

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Date:   Sun, 24 May 2020 03:26:50 +0000
From:   Anson Huang <anson.huang@....com>
To:     Anson Huang <anson.huang@....com>,
        "rui.zhang@...el.com" <rui.zhang@...el.com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "amit.kucheria@...durent.com" <amit.kucheria@...durent.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V3] thermal: imx: Add missing of_node_put()

Gentle ping...


> Subject: [PATCH V3] thermal: imx: Add missing of_node_put()
> 
> After finishing using cpu node got from of_get_cpu_node(), of_node_put()
> needs to be called, the cpufreq policy also needs to be put unconditionally.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> Changes since V2:
> 	- call cpufreq_cpu_put() unconditionally after cooling register done.
> ---
>  drivers/thermal/imx_thermal.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
> index e761c9b..8764cb5 100644
> --- a/drivers/thermal/imx_thermal.c
> +++ b/drivers/thermal/imx_thermal.c
> @@ -649,7 +649,7 @@ MODULE_DEVICE_TABLE(of, of_imx_thermal_match);
> static int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
> {
>  	struct device_node *np;
> -	int ret;
> +	int ret = 0;
> 
>  	data->policy = cpufreq_cpu_get(0);
>  	if (!data->policy) {
> @@ -661,20 +661,19 @@ static int
> imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
> 
>  	if (!np || !of_find_property(np, "#cooling-cells", NULL)) {
>  		data->cdev = cpufreq_cooling_register(data->policy);
> -		if (IS_ERR(data->cdev)) {
> +		if (IS_ERR(data->cdev))
>  			ret = PTR_ERR(data->cdev);
> -			cpufreq_cpu_put(data->policy);
> -			return ret;
> -		}
>  	}
> 
> -	return 0;
> +	cpufreq_cpu_put(data->policy);
> +	of_node_put(np);
> +
> +	return ret;
>  }
> 
>  static void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data
> *data)  {
>  	cpufreq_cooling_unregister(data->cdev);
> -	cpufreq_cpu_put(data->policy);
>  }
> 
>  #else
> --
> 2.7.4