linux-kernel - Re: [PATCH] Thermal: Allow first update of cooling device state

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Date:	Mon, 24 Feb 2014 15:13:56 +0800
From:	Wei Ni <wni@...dia.com>
To:	"rui.zhang@...el.com" <rui.zhang@...el.com>
CC:	"durgadoss.r@...el.com" <durgadoss.r@...el.com>,
	"eduardo.valentin@...com" <eduardo.valentin@...com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Wei Ni <wni@...dia.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Thermal: Allow first update of cooling device state

Hi, Rui
Do you have any comment for it ?

Thanks.
Wei.

On 02/17/2014 11:02 AM, Wei Ni wrote:
> In initialization, if the cooling device is initialized at
> max cooling state, and the thermal zone temperature is below
> the first trip point, then the cooling state can't be updated
> to the right state, untill the first trip point be triggered.
> 
> To fix this issue, allow first update of cooling device state
> during registration, initialized "updated" device field as
> "false" (instead of "true").
> 
> Signed-off-by: Wei Ni <wni@...dia.com>
> ---
>  drivers/thermal/thermal_core.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index 338a88b..02f57af 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -1107,7 +1107,7 @@ __thermal_cooling_device_register(struct device_node *np,
>  	INIT_LIST_HEAD(&cdev->thermal_instances);
>  	cdev->np = np;
>  	cdev->ops = ops;
> -	cdev->updated = true;
> +	cdev->updated = false;
>  	cdev->device.class = &thermal_class;
>  	cdev->devdata = devdata;
>  	dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
> 

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