linux-kernel - Re: [RESEND][PATCH 1/3] PM / devfreq: exynos4_bus: Fix missing mutex_unlock if opp_find_freq

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Date:	Sat, 13 Apr 2013 01:20:23 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"myungjoo.ham" <myungjoo.ham@...sung.com>,
	'Axel Lin' <axel.lin@...ics.com>
Cc:	'Kyungmin Park' <kyungmin.park@...sung.com>,
	'Kukjin Kim' <kgene.kim@...sung.com>,
	"'Rafael J. Wysocki'" <rafael.j.wysocki@...el.com>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND][PATCH 1/3] PM / devfreq: exynos4_bus: Fix missing mutex_unlock if opp_find_freq_floor fails

On Friday, April 12, 2013 09:11:00 PM myungjoo.ham wrote:
> > On Friday, April 12, 2013 11:52:01 AM 함명주 wrote:
> > > > On Friday, April 12, 2013 01:54:18 PM Axel Lin wrote:
> > > > > We need to call mutex_unlock() in the error path.
> > > > > 
> > > > > Signed-off-by: Axel Lin <axel.lin@...ics.com>
> > > > 
> > > > All three patches applied to linux-pm.git/linux-next.
> > > > 
> > > > Exynos maintainers, if you have any objections, please holler.
> > > > 
> > > > Thanks,
> > > > Rafael
> > > 
> > > This patch was included in the last pull-request patchset
> > > though the path was updated. (its precedessor patch moved
> > > exynos drivers to /drivers/devfreq/exynos/* after adding
> > > Exynos common driver files)
> > 
> > OK, so do you want me to drop it?
> > 
> > What about the remaining two?
> 
> Yes, please drop 1/3. It's duplicated.
> 
> The patches 2~3/3 can wait. They are actually not bugfixes.

OK, I've dropped all three.

Axel, please push [2-3/3] thorugh the Exynos tree.

Thanks,
Rafael


> > > > > ---
> > > > >  drivers/devfreq/exynos4_bus.c |    3 ++-
> > > > >  1 file changed, 2 insertions(+), 1 deletion(-)
> > > > > 
> > > > > diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c
> > > > > index 1deee09..54b9615 100644
> > > > > --- a/drivers/devfreq/exynos4_bus.c
> > > > > +++ b/drivers/devfreq/exynos4_bus.c
> > > > > @@ -974,7 +974,8 @@ static int exynos4_busfreq_pm_notifier_event(struct notifier_block *this,
> > > > >  			rcu_read_unlock();
> > > > >  			dev_err(data->dev, "%s: unable to find a min freq\n",
> > > > >  				__func__);
> > > > > -			return PTR_ERR(opp);
> > > > > +			err = PTR_ERR(opp);
> > > > > +			goto unlock;
> > > > >  		}
> > > > >  		new_oppinfo.rate = opp_get_freq(opp);
> > > > >  		new_oppinfo.volt = opp_get_voltage(opp);
> > > > > 
> > 
> >
> 
> --
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-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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