usbnet: Add stop function pointer to 'struct rndis_data'.

Allow minidriver to know that netdev has stopped. This is to let
wireless turn off radio when usbnet dev is stopped.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index edfd9e10ceba..25e435c49040 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -575,7 +575,9 @@ EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs);
 int usbnet_stop (struct net_device *net)
 {
         struct usbnet           *dev = netdev_priv(net);
+        struct driver_info      *info = dev->driver_info;
         int                     temp;
+        int                     retval;
         DECLARE_WAIT_QUEUE_HEAD_ONSTACK (unlink_wakeup);
         DECLARE_WAITQUEUE (wait, current);
 
@@ -587,6 +589,18 @@ int usbnet_stop (struct net_device *net)
                         net->stats.rx_errors, net->stats.tx_errors
                         );
 
+        /* allow minidriver to stop correctly (wireless devices to turn off
+         * radio etc) */
+        if (info->stop) {
+                retval = info->stop(dev);
+                if (retval < 0 && netif_msg_ifdown(dev))
+                        devinfo(dev,
+                                "stop fail (%d) usbnet usb-%s-%s, %s",
+                                retval,
+                                dev->udev->bus->bus_name, dev->udev->devpath,
+                                info->description);
+        }
+
         // ensure there are no more active urbs
         add_wait_queue (&unlink_wakeup, &wait);
         dev->wait = &unlink_wakeup;
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 310e18a880ff..7c17b2efba86 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -97,6 +97,9 @@ struct driver_info {
         /* reset device ... can sleep */
         int     (*reset)(struct usbnet *);
 
+        /* stop device ... can sleep */
+        int     (*stop)(struct usbnet *);
+
         /* see if peer is connected ... can sleep */
         int     (*check_connect)(struct usbnet *);