[PATCH 16/52] cpuidle: fix error handling in __cpuidle_register_device

Len Brown
2012-07-25T03:42:37Z

From: Colin Cross <ccross@android.com>

Fix the error handling in __cpuidle_register_device to include
the missing list_del. Move it to a label, which will simplify
the error handling when coupled states are added.

Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Colin Cross <ccross@android.com>
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/cpuidle/cpuidle.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 3e3e3e4..4540672 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -403,13 +403,18 @@ static int __cpuidle_register_device(struct cpuidle_device *dev)

per_cpu(cpuidle_devices, dev->cpu) = dev;
list_add(&dev->device_list, &cpuidle_detected_devices);
- if ((ret = cpuidle_add_sysfs(cpu_dev))) {
- module_put(cpuidle_driver->owner);
- return ret;
- }
+ ret = cpuidle_add_sysfs(cpu_dev);
+ if (ret)
+ goto err_sysfs;

dev->registered = 1;
return 0;
+
+err_sysfs:
+ list_del(&dev->device_list);
+ per_cpu(cpuidle_devices, dev->cpu) = NULL;
+ module_put(cpuidle_driver->owner);
+ return ret;
}

/**
--
1.7.12.rc0