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

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Message-ID: <1368151722.17344.1.camel@deadeye.wl.decadent.org.uk>
Date:	Fri, 10 May 2013 03:08:42 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Luis Henriques <luis.henriques@...onical.com>
Cc:	Jonghwan Choi <jhbird.choi@...sung.com>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	'Wei Yongjun' <yongjun_wei@...ndmicro.com.cn>,
	'Peter Zijlstra' <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 3.8-stable] perf: Fix error return code

On Tue, 2013-04-23 at 11:56 +0100, Luis Henriques wrote:
> 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.

I agree; I've queued this up for 3.2.y, thanks.

Ben.

> Cheers,
> --
> Luis
> 
> > 
> > ------------------
> > 
> > From: "Wei Yongjun <yongjun_wei@...ndmicro.com.cn>"
> > 
> > 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@...ndmicro.com.cn>
> > Cc: a.p.zijlstra@...llo.nl
> > Cc: paulus@...ba.org
> > Cc: acme@...stprotocols.net
> > Link:
> > http://lkml.kernel.org/r/CAPgLHd8j_fWcgqe%3DKLWjpBj%2B%3Do0Pw6Z-SEq%3DNTPU08
> > c2w1tngQ@...l.gmail.com
> > [ Tweaked the error code setting placement and the changelog. ]
> > Signed-off-by: Ingo Molnar <mingo@...nel.org>
> > Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com>
> > ---
> >  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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> 

-- 
Ben Hutchings
For every action, there is an equal and opposite criticism. - Harrison

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