usbnet & cdc-ether: Autosuspend for online devices

Using remote wakeup and delayed transmission to allow
online device to go into usb autosuspend.
Minimal alternate support for devices that don't support
remote wakeup.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 8c84881f8478..8ce61359bf73 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -55,6 +55,7 @@ struct usbnet {
         struct sk_buff_head     done;
         struct sk_buff_head     rxq_pause;
         struct urb              *interrupt;
+        struct usb_anchor       deferred;
         struct tasklet_struct   bh;
 
         struct work_struct      kevent;
@@ -65,6 +66,8 @@ struct usbnet {
 #               define EVENT_STS_SPLIT  3
 #               define EVENT_LINK_RESET 4
 #               define EVENT_RX_PAUSED  5
+#               define EVENT_DEV_WAKING 6
+#               define EVENT_DEV_ASLEEP 7
 };
 
 static inline struct usb_driver *driver_of(struct usb_interface *intf)
@@ -109,6 +112,9 @@ struct driver_info {
         /* see if peer is connected ... can sleep */
         int     (*check_connect)(struct usbnet *);
 
+        /* (dis)activate runtime power management */
+        int     (*manage_power)(struct usbnet *, int);
+
         /* for status polling */
         void    (*status)(struct usbnet *, struct urb *);