rndis_host: Add link_change function pointer to 'struct rndis_data'.

Callback to signal link state changes from minidriver to
'subminidrivers'.

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

2 files changed, 24 insertions, 4 deletions

diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index 08139030954f..800c9d02c3f4 100644
--- a/drivers/net/usb/rndis_host.c
+++ b/drivers/net/usb/rndis_host.c
@@ -148,10 +148,26 @@ int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
                                         request_id, xid);
                                 /* then likely retry */
                         } else switch (buf->msg_type) {
-                        case RNDIS_MSG_INDICATE: {      /* fault */
-                                // struct rndis_indicate *msg = (void *)buf;
-                                dev_info(&info->control->dev,
-                                        "rndis fault indication\n");
+                        case RNDIS_MSG_INDICATE: {      /* fault/event */
+                                struct rndis_indicate *msg = (void *)buf;
+                                int state = 0;
+
+                                switch (msg->status) {
+                                case RNDIS_STATUS_MEDIA_CONNECT:
+                                        state = 1;
+                                case RNDIS_STATUS_MEDIA_DISCONNECT:
+                                        dev_info(&info->control->dev,
+                                                "rndis media %sconnect\n",
+                                                !state?"dis":"");
+                                        if (dev->driver_info->link_change)
+                                                dev->driver_info->link_change(
+                                                        dev, state);
+                                        break;
+                                default:
+                                        dev_info(&info->control->dev,
+                                                "rndis indication: 0x%08x\n",
+                                                le32_to_cpu(msg->status));
+                                }
                                 }
                                 break;
                         case RNDIS_MSG_KEEPALIVE: {     /* ping */
diff --git a/drivers/net/usb/usbnet.h b/drivers/net/usb/usbnet.h
index 25b63d3339dc..e0501da3dd11 100644
--- a/drivers/net/usb/usbnet.h
+++ b/drivers/net/usb/usbnet.h
@@ -121,6 +121,10 @@ struct driver_info {
          * right after minidriver have initialized hardware. */
         int     (*early_init)(struct usbnet *dev);
 
+        /* called by minidriver when link state changes, state: 0=disconnect,
+         * 1=connect */
+        void    (*link_change)(struct usbnet *dev, int state);
+
         /* for new devices, use the descriptor-reading code instead */
         int             in;             /* rx endpoint */
         int             out;            /* tx endpoint */