This is a note to let you know that I've just added the patch titled x86: PM: Make APM idle driver initialize polling state to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-pm-make-apm-idle-driver-initialize-polling-state.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From f859422075165e32c00c8d75d63f300015cc07ae Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx> Date: Tue, 6 Feb 2018 18:55:12 +0100 Subject: x86: PM: Make APM idle driver initialize polling state MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> commit f859422075165e32c00c8d75d63f300015cc07ae upstream. 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.syrjala@xxxxxxxxxxxxxxx> Tested-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Cc: 4.14+ <stable@xxxxxxxxxxxxxxx> # 4.14+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/kernel/apm_32.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/x86/kernel/apm_32.c +++ b/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); Patches currently in stable-queue which might be from rafael.j.wysocki@xxxxxxxxx are queue-4.14/x86-pm-make-apm-idle-driver-initialize-polling-state.patch queue-4.14/cpufreq-powernv-dont-assume-distinct-pstate-values-for-nominal-and-pmin.patch