linux-kernel - Re: [PATCH 2/2] Thermal:Remove usless if(!result) before return tz

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Date:	Mon, 20 Oct 2014 08:10:41 -0400
From:	Eduardo Valentin <edubezval@...il.com>
To:	Yao Dongdong <yaodongdong@...wei.com>
Cc:	Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] Thermal:Remove usless if(!result) before return tz

Hello Yao

On Mon, Oct 20, 2014 at 04:27:59PM +0800, Yao Dongdong wrote:
> result is always zero when comes here.
> 
> Signed-off-by:yaodongdong@...wei.com
> 
> ---
>  drivers/thermal/thermal_core.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
> index 5b7d466..19cac8e 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -1568,8 +1568,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
> 
>     thermal_zone_device_update(tz);
> 
> -   if (!result)
> -       return tz;
> +   return tz;
> 

Adding a return here will make the resource release below not reachable
in the fail path.

>  unregister:
>     release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
> --
> 1.8.0.1
> 
> 

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