linux-kernel - Re: [PATCH v6 07/11] powerpc/powernv: set power_save func after the idle states are initialized

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Date:	Wed, 22 Jun 2016 11:54:28 +1000
From:	Benjamin Herrenschmidt <benh@....ibm.com>
To:	"Shreyas B. Prabhu" <shreyas@...ux.vnet.ibm.com>,
	mpe@...erman.id.au
Cc:	ego@...ux.vnet.ibm.com, mikey@...ling.org,
	linux-kernel@...r.kernel.org, maddy@...ux.vnet.ibm.com,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v6 07/11] powerpc/powernv: set power_save func after the
 idle states are initialized

On Wed, 2016-06-08 at 11:54 -0500, Shreyas B. Prabhu wrote:
> pnv_init_idle_states discovers supported idle states from the
> device tree and does the required initialization. Set power_save
> function pointer only after this initialization is done
> 
> Reviewed-by: Gautham R. Shenoy <ego@...ux.vnet.ibm.com>
> Signed-off-by: Shreyas B. Prabhu <shreyas@...ux.vnet.ibm.com>

Acked-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>

Please merge that one as-is now, no need to wait for the rest, as
otherwise pwoer9 crashes at boot. It doesn't need to wait for the
rest of the series.

Cheers,
Ben.

> ---
> - No changes since v1
> 
>  arch/powerpc/platforms/powernv/idle.c  | 3 +++
>  arch/powerpc/platforms/powernv/setup.c | 2 +-
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/platforms/powernv/idle.c
> b/arch/powerpc/platforms/powernv/idle.c
> index fcc8b68..fbb09fb 100644
> --- a/arch/powerpc/platforms/powernv/idle.c
> +++ b/arch/powerpc/platforms/powernv/idle.c
> @@ -285,6 +285,9 @@ static int __init pnv_init_idle_states(void)
>  	}
>  
>  	pnv_alloc_idle_core_states();
> +
> +	if (supported_cpuidle_states & OPAL_PM_NAP_ENABLED)
> +		ppc_md.power_save = power7_idle;
>  out_free:
>  	kfree(flags);
>  out:
> diff --git a/arch/powerpc/platforms/powernv/setup.c
> b/arch/powerpc/platforms/powernv/setup.c
> index ee6430b..8492bbb 100644
> --- a/arch/powerpc/platforms/powernv/setup.c
> +++ b/arch/powerpc/platforms/powernv/setup.c
> @@ -315,7 +315,7 @@ define_machine(powernv) {
>  	.get_proc_freq          = pnv_get_proc_freq,
>  	.progress		= pnv_progress,
>  	.machine_shutdown	= pnv_shutdown,
> -	.power_save             = power7_idle,
> +	.power_save             = NULL,
>  	.calibrate_decr		= generic_calibrate_decr,
>  #ifdef CONFIG_KEXEC
>  	.kexec_cpu_down		= pnv_kexec_cpu_down,