cpuidle_device is touched during the cpu hotplug. In order to cope with the
incoming
patch [3/3], which causes the dir /sys/../cpuX is created/destroyed during
hotplug,
we also need to create the file cpuX/cpuidle dynamically.
Signed-off-by: Pingfan Liu <kernelf...@gmail.com>
Reviewed-by: Hari Bathini <hbath...@linux.vnet.ibm.com>
---
drivers/cpuidle/cpuidle-powernv.c | 2 ++
drivers/cpuidle/cpuidle-pseries.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/cpuidle/cpuidle-powernv.c
b/drivers/cpuidle/cpuidle-powernv.c
index 1a8234e..962c944 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++ b/drivers/cpuidle/cpuidle-powernv.c
@@ -144,6 +144,7 @@ static int powernv_cpuidle_cpu_online(unsigned int cpu)
struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
if (dev && cpuidle_get_driver()) {
+ cpuidle_register_device(dev);
cpuidle_pause_and_lock();
cpuidle_enable_device(dev);
cpuidle_resume_and_unlock();
@@ -159,6 +160,7 @@ static int powernv_cpuidle_cpu_dead(unsigned int cpu)
cpuidle_pause_and_lock();
cpuidle_disable_device(dev);
cpuidle_resume_and_unlock();
+ cpuidle_unregister_device(dev);
}
return 0;
}
diff --git a/drivers/cpuidle/cpuidle-pseries.c
b/drivers/cpuidle/cpuidle-pseries.c
index 9e56bc4..a53be8a 100644
--- a/drivers/cpuidle/cpuidle-pseries.c
+++ b/drivers/cpuidle/cpuidle-pseries.c
@@ -193,6 +193,7 @@ static int pseries_cpuidle_cpu_online(unsigned int cpu)
struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
if (dev && cpuidle_get_driver()) {
+ cpuidle_register_device(dev);
cpuidle_pause_and_lock();
cpuidle_enable_device(dev);
cpuidle_resume_and_unlock();
@@ -208,6 +209,7 @@ static int pseries_cpuidle_cpu_dead(unsigned int cpu)
cpuidle_pause_and_lock();
cpuidle_disable_device(dev);
cpuidle_resume_and_unlock();
+ cpuidle_unregister_device(dev);
}
return 0;
}
--
2.7.4
