Staging: hv: remove OnChildDeviceAdd vmbus_driver callback

It's only ever set to one function, so just call that function instead.

Cc: Haiyang Zhang <[e-mail]>
Cc: Hank Janssen <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/hv/vmbus.c

···
  */
 int VmbusChildDeviceAdd(struct hv_device *ChildDevice)
 {
-	struct vmbus_driver *vmbusDriver = (struct vmbus_driver *)gDriver;
-
-	return vmbusDriver->OnChildDeviceAdd(gDevice, ChildDevice);
+	return vmbus_child_device_register(gDevice, ChildDevice);
 }
 
 /*

drivers/staging/hv/vmbus_api.h

···
 	/* !! Must be the 1st field !! */
 	/* FIXME if ^, then someone is doing somthing stupid */
 	struct hv_driver Base;
-
-	/* Set by the caller */
-	int (*OnChildDeviceAdd)(struct hv_device *RootDevice,
-				struct hv_device *ChildDevice);
 };
 
 int VmbusInitialize(struct hv_driver *drv);

drivers/staging/hv/vmbus_drv.c

···
 static void vmbus_device_release(struct device *device);
 static void vmbus_bus_release(struct device *device);
 
-static int vmbus_child_device_register(struct hv_device *root_device_obj,
-				       struct hv_device *child_device_obj);
 static ssize_t vmbus_show_device_attr(struct device *dev,
 				      struct device_attribute *dev_attr,
 				      char *buf);
···
 	struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx;
 	int ret;
 	unsigned int vector;
-
-	/*
-	 * Set this up to allow lower layer to callback to add/remove child
-	 * devices on the bus
-	 */
-	vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register;
 
 	/* Call to bus driver to initialize */
 	ret = drv_init(&vmbus_drv_obj->Base);
···
 /*
  * vmbus_child_device_register - Register the child device on the specified bus
  */
-static int vmbus_child_device_register(struct hv_device *root_device_obj,
-				       struct hv_device *child_device_obj)
+int vmbus_child_device_register(struct hv_device *root_device_obj,
+				struct hv_device *child_device_obj)
 {
 	int ret = 0;
 	struct vm_device *root_device_ctx =

drivers/staging/hv/vmbus_private.h

···
 					 struct vmbus_channel *channel);
 
 int VmbusChildDeviceAdd(struct hv_device *Device);
-
+int vmbus_child_device_register(struct hv_device *root_device_obj,
+				struct hv_device *child_device_obj);
 void vmbus_child_device_unregister(struct hv_device *device_obj);
 
 /* static void */