linux-kernel - Re: [PATCH] cpuidle/coupled: Init cpuidle_device::safe_state

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Date:	Tue, 4 Aug 2015 13:19:09 +0800
From:	pang.xunlei@....com.cn
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-kernel-owner@...r.kernel.org,
	linux-pm@...r.kernel.org, "Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: [PATCH] cpuidle/coupled: Init cpuidle_device::safe_state_index

Hi Daniel,

Daniel Lezcano <daniel.lezcano@...aro.org> wrote 2015-08-04 AM 12:22:54:
> Re: [PATCH] cpuidle/coupled: Init cpuidle_device::safe_state_index
> 
> On 07/23/2015 02:31 PM, Xunlei Pang wrote:
> > From: Xunlei Pang <pang.xunlei@....com.cn>
> >
> > cpuidle_device::safe_state_index need to be initialized before use,
> > so assign the driver's safe_state_index to it.
> >
> > Signed-off-by: Xunlei Pang <pang.xunlei@....com.cn>
> > ---
> >   drivers/cpuidle/cpuidle.c | 2 ++
> >   1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
> > index e8e2775..ed5c8efe 100644
> > --- a/drivers/cpuidle/cpuidle.c
> > +++ b/drivers/cpuidle/cpuidle.c
> > @@ -585,6 +585,8 @@ int cpuidle_register(struct cpuidle_driver *drv,
> >          */
> >         if (coupled_cpus)
> >            device->coupled_cpus = *coupled_cpus;
> > +
> > +      device->safe_state_index = drv->safe_state_index;
> 
> Hey, good catch. We are lucky the safe_state_index is always zero.
> 
> I think we can simplify the code by removing the safe_state_index from 
> the cpuidle_device structure and use the one in the cpuidle_driver 
> structure in coupled.c

Will do, thanks!

Regards,
-Xunlei

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