1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/usb/net/usbnet.h b/drivers/usb/net/usbnet.h
index 21b5feb54fc0..7aa0abd1a9bd 100644
--- a/drivers/usb/net/usbnet.h
+++ b/drivers/usb/net/usbnet.h
@@ -126,6 +126,28 @@ extern int usbnet_resume (struct usb_interface *);
 extern void usbnet_disconnect(struct usb_interface *);
 
 
+/* Drivers that reuse some of the standard USB CDC infrastructure
+ * (notably, using multiple interfaces according to the the CDC
+ * union descriptor) get some helper code.
+ */
+struct cdc_state {
+        struct usb_cdc_header_desc      *header;
+        struct usb_cdc_union_desc       *u;
+        struct usb_cdc_ether_desc       *ether;
+        struct usb_interface            *control;
+        struct usb_interface            *data;
+};
+
+extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *);
+extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *);
+
+/* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
+#define DEFAULT_FILTER  (USB_CDC_PACKET_TYPE_BROADCAST \
+                        |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
+                        |USB_CDC_PACKET_TYPE_PROMISCUOUS \
+                        |USB_CDC_PACKET_TYPE_DIRECTED)
+
+
 /* we record the state for each of our queued skbs */
 enum skb_state {
         illegal = 0,