cpuidle: fix error handling in __cpuidle_register_device

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>

1 files changed, 9 insertions, 4 deletions

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 3e3e3e4d9581..4540672a2e1c 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;
 }
 
 /**