linux-kernel - Re: [2.6 patch] drivers/thermal/thermal.c: fix a check-after-use

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Date:	Sat, 23 Feb 2008 02:19:49 -0500
From:	Len Brown <lenb@...nel.org>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	Zhang Rui <rui.zhang@...el.com>,
	Thomas Sujith <sujith.thomas@...el.com>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [2.6 patch] drivers/thermal/thermal.c: fix a check-after-use

On Tuesday 19 February 2008 19:14, Adrian Bunk wrote:
> This patch fixes a check-after-use spotted by the Coverity checker.
> 
> Signed-off-by: Adrian Bunk <bunk@...nel.org>
> 
> ---
> 570462ca4441d8d63dfd46efe6e5b2b1c251a611 diff --git a/drivers/thermal/thermal.c b/drivers/thermal/thermal.c
> index e782b3e..958654b 100644
> --- a/drivers/thermal/thermal.c
> +++ b/drivers/thermal/thermal.c
> @@ -308,10 +308,10 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
>  	struct thermal_cooling_device_instance *pos;
>  	int result;
>  
> -	if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
> +	if (!tz || !cdev)
>  		return -EINVAL;
>  
> -	if (!tz || !cdev)
> +	if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
>  		return -EINVAL;
>  
>  	dev =
> 
> --

this patch no longer applies because the bogus check for a programming error
was already replaced by a better check of run-time params.

thanks,
-len
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