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intel_idle: Clean up all registered devices on exit. 

This driver registers cpuidle devices when a CPU comes online, but it
leaves the registrations in place when a CPU goes offline.  The module
exit code only unregisters the currently online CPUs, leaving the
devices for offline CPUs dangling.

This patch changes the driver to clean up all registrations on exit,
even those from CPUs that are offline.

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>
This commit is contained in:
Richard Cochran 2016-04-06 17:00:57 -04:00 committed by Rafael J. Wysocki
parent 08820546e4
commit 3e66a9ab53
1 changed files with 8 additions and 1 deletions
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9
drivers/idle/intel_idle.c
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@ -1245,12 +1245,19 @@ static int __init intel_idle_init(void)
static void __exit intel_idle_exit(void)
{
struct cpuidle_device *dev;
int i;
cpu_notifier_register_begin();
if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE)
on_each_cpu(__setup_broadcast_timer, (void *)false, 1);
__unregister_cpu_notifier(&cpu_hotplug_notifier);
intel_idle_cpuidle_devices_uninit();
for_each_possible_cpu(i) {
dev = per_cpu_ptr(intel_idle_cpuidle_devices, i);
cpuidle_unregister_device(dev);
}
cpu_notifier_register_done();