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 4.15-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-4.15 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
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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-4.15/x86-pm-make-apm-idle-driver-initialize-polling-state.patch
queue-4.15/cpufreq-powernv-dont-assume-distinct-pstate-values-for-nominal-and-pmin.patch