ACPI / cpuidle: fix deadlock between cpuidle_lock and cpu_hotplug.lock

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / drivers / acpi / processor_idle.c

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 3dca36d..17f9ec5 100644 (file)
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1071,9 +1071,9 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr)
 
        if (pr->id == 0 && cpuidle_get_driver() == &acpi_idle_driver) {
 
-               cpuidle_pause_and_lock();
                /* Protect against cpu-hotplug */
                get_online_cpus();
+               cpuidle_pause_and_lock();
 
                /* Disable all cpuidle devices */
                for_each_online_cpu(cpu) {
@@ -1100,8 +1100,8 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr)
                                cpuidle_enable_device(dev);
                        }
                }
-               put_online_cpus();
                cpuidle_resume_and_unlock();
+               put_online_cpus();
        }
 
        return 0;