From: Richard Cochran <rcochran@linutronix.de>
Date: Wed, 6 Apr 2016 21:00:55 +0000 (-0400)
Subject: intel_idle: Don't overreact to a cpuidle registration failure.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b69ef2c099c3e5f11bd5c33a9530d6522f72c9aa;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

intel_idle: Don't overreact to a cpuidle registration failure.

The helper function, intel_idle_cpu_init, registers one new device
with the cpuidle layer.  If the registration should fail, that
function immediately calls intel_idle_cpuidle_devices_uninit() to
unregister every last CPU's device.  However, it makes no sense to do
so, when called from the hot plug notifier callback.

This patch moves the call to intel_idle_cpuidle_devices_uninit()
outside of the helper function to the one call site that actually
needs to perform the de-registrations.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index ab34cd8b933c..4418cfa2a4fc 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -1175,7 +1175,6 @@ static int intel_idle_cpu_init(int cpu)
 
 	if (cpuidle_register_device(dev)) {
 		pr_debug(PREFIX "cpuidle_register_device %d failed!\n", cpu);
-		intel_idle_cpuidle_devices_uninit();
 		return -EIO;
 	}
 
@@ -1219,6 +1218,7 @@ static int __init intel_idle_init(void)
 	for_each_online_cpu(i) {
 		retval = intel_idle_cpu_init(i);
 		if (retval) {
+			intel_idle_cpuidle_devices_uninit();
 			cpu_notifier_register_done();
 			cpuidle_unregister_driver(&intel_idle_driver);
 			free_percpu(intel_idle_cpuidle_devices);