[PATCH 08/10] intel_idle: Don't overreact to a cpuidle registration failure.

From: Richard Cochran
Date: Tue Mar 29 2016 - 09:17:36 EST


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.

Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Signed-off-by: Richard Cochran <rcochran@xxxxxxxxxxxxx>
---
drivers/idle/intel_idle.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index ab34cd8..4418cfa 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);
--
2.1.4