Fix and prevent bugs in device_register()

When adding to the global device list, we were adding devices just after their parent, while we wanted to
add them just before. That way when we iterate over the list on suspend and shutdown, we'll hit all
children before the parents.

Make sure dev->driver_list and dev->bus_list are initialized when the device is registered

Remove device from global and parent's list if registration failed.

drivers/base/core.c

@@ -191,7 +191,6 @@ void driver_detach(struct device_driver * drv)
 int device_register(struct device *dev)
 {
 	int error;
-	struct device *prev_dev;
 
 	if (!dev || !strlen(dev->bus_id))
 		return -EINVAL;
@@ -199,6 +198,8 @@ int device_register(struct device *dev)
 	INIT_LIST_HEAD(&dev->node);
 	INIT_LIST_HEAD(&dev->children);
 	INIT_LIST_HEAD(&dev->g_list);
+	INIT_LIST_HEAD(&dev->driver_list);
+	INIT_LIST_HEAD(&dev->bus_list);
 	spin_lock_init(&dev->lock);
 	atomic_set(&dev->refcount,2);
 
@@ -208,12 +209,7 @@ int device_register(struct device *dev)
 		get_device(dev->parent);
 
 		spin_lock(&device_lock);
-		if (list_empty(&dev->parent->children))
-			prev_dev = dev->parent;
-		else
-			prev_dev = list_entry(dev->parent->children.prev, struct device, node);
-		list_add(&dev->g_list, &prev_dev->g_list);
-
+		list_add_tail(&dev->g_list,&dev->parent->g_list);
 		list_add_tail(&dev->node,&dev->parent->children);
 		spin_unlock(&device_lock);
 	}
@@ -234,9 +230,15 @@ int device_register(struct device *dev)
 		platform_notify(dev);
 
  register_done:
-	put_device(dev);
-	if (error && dev->parent)
+	if (error) {
+		spin_lock(&device_lock);
+		list_del_init(&dev->g_list);
+		list_del_init(&dev->node);
+		spin_unlock(&device_lock);
+		if (dev->parent)
 			put_device(dev->parent);
+	}
+	put_device(dev);
 	return error;
 }