On Tue, Feb 06, 2018 at 07:02:58PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
> 
> Update the APM driver overlooked by commit 1b39e3f813b4 (cpuidle: Make
> drivers initialize polling state) to initialize the polling state like
> the other cpuidle drivers modified by that commit to prevent cpuidle
> from crashing.
> 
> Fixes: 1b39e3f813b4 (cpuidle: Make drivers initialize polling state)
> Reported-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> Tested-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>

And maybe?

Cc: <sta...@vger.kernel.org> # v4.14+

> ---
>  arch/x86/kernel/apm_32.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> Index: linux-pm/arch/x86/kernel/apm_32.c
> ===================================================================
> --- linux-pm.orig/arch/x86/kernel/apm_32.c
> +++ linux-pm/arch/x86/kernel/apm_32.c
> @@ -2389,6 +2389,7 @@ static int __init apm_init(void)
>       if (HZ != 100)
>               idle_period = (idle_period * HZ) / 100;
>       if (idle_threshold < 100) {
> +             cpuidle_poll_state_init(&apm_idle_driver);
>               if (!cpuidle_register_driver(&apm_idle_driver))
>                       if (cpuidle_register_device(&apm_cpuidle_device))
>                               cpuidle_unregister_driver(&apm_idle_driver);
> 

-- 
Ville Syrjälä
Intel OTC

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