[PATCH 11/14] [rndis_host] Add link_change function pointer to 'struct rndis_data'.

[Jussi Kivilinna <jussi.kivilinna@mbnet.fi>]

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

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
---

 drivers/net/usb/rndis_host.c |   24 ++++++++++++++++++++----
 drivers/net/usb/usbnet.h     |    4 ++++
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index 0813903..800c9d0 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 25b63d3..e0501da 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 */