[PATCH] cpuidle/coupled: Init cpuidle_device::safe_state_index

[PATCH] cpuidle/coupled: Init cpuidle_device::safe_state_index

[Xunlei Pang]

From: Xunlei Pang <pang.xunlei@zte.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@zte.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;
 #endif
 		ret = cpuidle_register_device(device);
 		if (!ret)
-- 
1.9.1

Re: [PATCH] cpuidle/coupled: Init cpuidle_device::safe_state_index

[Daniel Lezcano]

On 07/23/2015 02:31 PM, Xunlei Pang wrote:
> From: Xunlei Pang <pang.xunlei@zte.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@zte.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




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Re: [PATCH] cpuidle/coupled: Init cpuidle_device::safe_state_index

[pang.xunlei]

Hi Daniel,

Daniel Lezcano <daniel.lezcano@linaro.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@zte.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@zte.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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