Staging: hv: remove struct vmbus_channel_interface

Now that no one uses this structure, remove it, and channel_interface.c
(which is now empty) and the function, vmbus_get_interface() which is
not needed anymore either.

Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/Makefile

@@ -6,7 +6,7 @@ obj-$(CONFIG_HYPERV_UTILS)	+= hv_utils.o
 
 hv_vmbus-y := vmbus_drv.o osd.o \
 		 vmbus.o hv.o connection.o channel.o \
-		 channel_mgmt.o channel_interface.o ring_buffer.o
+		 channel_mgmt.o ring_buffer.o
 hv_storvsc-y := storvsc_drv.o storvsc.o
 hv_blkvsc-y := blkvsc_drv.o blkvsc.o
 hv_netvsc-y := netvsc_drv.o netvsc.o rndis_filter.o

drivers/staging/hv/blkvsc_drv.c

@@ -176,8 +176,6 @@ static int blkvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
 	struct driver_context *drv_ctx = &g_blkvsc_drv.drv_ctx;
 	int ret;
 
-	vmbus_get_interface(&storvsc_drv_obj->Base.VmbusChannelInterface);
-
 	storvsc_drv_obj->RingBufferSize = blkvsc_ringbuffer_size;
 
 	/* Callback to client driver to complete the initialization */

drivers/staging/hv/netvsc_drv.c

@@ -492,8 +492,6 @@ static int netvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
 	struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
 	int ret;
 
-	vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface);
-
 	net_drv_obj->RingBufferSize = ring_size * PAGE_SIZE;
 	net_drv_obj->OnReceiveCallback = netvsc_recv_callback;
 	net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback;

drivers/staging/hv/storvsc_drv.c

@@ -141,8 +141,6 @@ static int storvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
 	struct storvsc_driver_object *storvsc_drv_obj = &g_storvsc_drv.drv_obj;
 	struct driver_context *drv_ctx = &g_storvsc_drv.drv_ctx;
 
-	vmbus_get_interface(&storvsc_drv_obj->Base.VmbusChannelInterface);
-
 	storvsc_drv_obj->RingBufferSize = storvsc_ringbuffer_size;
 
 	/* Callback to client driver to complete the initialization */

drivers/staging/hv/vmbus.h

@@ -69,10 +69,8 @@ static inline struct driver_context *driver_to_driver_context(struct device_driv
 
 
 /* Vmbus interface */
-
 int vmbus_child_driver_register(struct driver_context *driver_ctx);
 void vmbus_child_driver_unregister(struct driver_context *driver_ctx);
-void vmbus_get_interface(struct vmbus_channel_interface *interface);
 
 extern struct completion hv_channel_ready;
 

drivers/staging/hv/vmbus_api.h

@@ -84,20 +84,6 @@ struct hv_device_info {
 	struct hv_dev_port_info Outbound;
 };
 
-/**
- * struct vmbus_channel_interface - Contains member functions for vmbus channel
- *
- * This structure contains function pointer to control vmbus channel
- * behavior. None of these functions is externally callable, but they
- * are used for normal vmbus channel internal behavior.
- * Only used by Hyper-V drivers.
- */
-struct vmbus_channel_interface {
-};
-
-extern const struct vmbus_channel_interface vmbus_ops;
-
-
 /* Base driver object */
 struct hv_driver {
 	const char *name;
@@ -108,8 +94,6 @@ struct hv_driver {
 	int (*OnDeviceAdd)(struct hv_device *device, void *data);
 	int (*OnDeviceRemove)(struct hv_device *device);
 	void (*OnCleanup)(struct hv_driver *driver);
-
-	struct vmbus_channel_interface VmbusChannelInterface;
 };
 
 /* Base device object */

drivers/staging/hv/vmbus_drv.c

@@ -485,23 +485,6 @@ void vmbus_child_driver_unregister(struct driver_context *driver_ctx)
 }
 EXPORT_SYMBOL(vmbus_child_driver_unregister);
 
-/**
- * vmbus_get_interface() - Get the vmbus channel interface.
- * @interface: Pointer to channel interface structure
- *
- * Get the Hyper-V channel used for the driver.
- *
- * @interface is of type &struct vmbus_channel_interface
- * This is invoked by child/client driver that sits above vmbus.
- *
- * Mainly used by Hyper-V drivers.
- */
-void vmbus_get_interface(struct vmbus_channel_interface *interface)
-{
-	*interface = vmbus_ops;
-}
-EXPORT_SYMBOL(vmbus_get_interface);
-
 /*
  * vmbus_child_device_create - Creates and registers a new child device
  * on the vmbus.