Re: [PATCH 3.8-stable] perf: Fix error return code

[Luis Henriques]

On Tue, Apr 23, 2013 at 11:57:51AM +0900, Jonghwan Choi wrote:
> 3.8-stable review patch.  If anyone has any objections, please let me know.

Thanks, I believe this is also applicable to 3.2.y, 3.4.y and 3.5.y.

Cheers,
--
Luis

> 
> ------------------
> 
> From: "Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>"
> 
> commit c481420248c6730246d2a1b1773d5d7007ae0835 upstream.
> 
> Fix to return -ENOMEM in the allocation error case instead of 0
> (if pmu_bus_running == 1), as done elsewhere in this function.
> 
> Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
> Cc: a.p.zijlstra@xxxxxxxxx
> Cc: paulus@xxxxxxxxx
> Cc: acme@xxxxxxxxxxxxxxxxxx
> Link:
> http://lkml.kernel.org/r/CAPgLHd8j_fWcgqe%3DKLWjpBj%2B%3Do0Pw6Z-SEq%3DNTPU08
> c2w1tngQ@xxxxxxxxxxxxxx
> [ Tweaked the error code setting placement and the changelog. ]
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
> Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
> ---
>  kernel/events/core.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 7b6646a..f6eba58 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -5988,6 +5988,7 @@ skip_type:
>  	if (pmu->pmu_cpu_context)
>  		goto got_cpu_context;
>  
> +	ret = -ENOMEM;
>  	pmu->pmu_cpu_context = alloc_percpu(struct perf_cpu_context);
>  	if (!pmu->pmu_cpu_context)
>  		goto free_dev;
> -- 
> 1.7.9.5
> 
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