Re: [2.6 patch] arch/i386/kernel/cpu/cpufreq/powernow-k8.c: fix a check-after-use

[Andi Kleen]

On Wednesday 19 April 2006 00:07, Adrian Bunk wrote:
> This patch fixes a check-after-use introduced by commit 
> 4211a30349e8d2b724cfb4ce2584604f5e59c299 and spotted by the Coverity 
> checker.

Good catch. Should probably go into 2.6.17

-Andi

> Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
> 
> ---
> 
>  arch/i386/kernel/cpu/cpufreq/powernow-k8.c |    7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> --- linux-2.6.17-rc1-mm3-full/arch/i386/kernel/cpu/cpufreq/powernow-k8.c.old	2006-04-18 20:32:27.000000000 +0200
> +++ linux-2.6.17-rc1-mm3-full/arch/i386/kernel/cpu/cpufreq/powernow-k8.c	2006-04-18 20:33:02.000000000 +0200
> @@ -905,14 +905,17 @@ static int powernowk8_target(struct cpuf
>  {
>  	cpumask_t oldmask = CPU_MASK_ALL;
>  	struct powernow_k8_data *data = powernow_data[pol->cpu];
> -	u32 checkfid = data->currfid;
> -	u32 checkvid = data->currvid;
> +	u32 checkfid;
> +	u32 checkvid;
>  	unsigned int newstate;
>  	int ret = -EIO;
>  
>  	if (!data)
>  		return -EINVAL;
>  
> +	checkfid = data->currfid;
> +	checkvid = data->currvid;
> +
>  	/* only run on specific CPU from here on */
>  	oldmask = current->cpus_allowed;
>  	set_cpus_allowed(current, cpumask_of_cpu(pol->cpu));
> 
> 
-
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