From c85d70ef64ebe5c92811113108517eaacff47f7e Mon Sep 17 00:00:00 2001
From: Vitaly Kuzmichev <vkuzmichev@mvista.com>
Date: Fri, 11 Feb 2011 18:18:32 +0300
Subject: USB-CDC: Port struct net_device_stats

Port struct net_device_stats and statistics collecting needed for
RNDIS protocol.

Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
---
 drivers/usb/gadget/ether.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'drivers')

diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 0e7549d6b1..8aa6240141 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -22,6 +22,7 @@
 
 #include <common.h>
 #include <asm/errno.h>
+#include <linux/netdevice.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/cdc.h>
 #include <linux/usb/gadget.h>
@@ -175,6 +176,7 @@ struct eth_dev {
 	struct usb_request	*tx_req, *rx_req;
 
 	struct eth_device	*net;
+	struct net_device_stats	stats;
 	unsigned int		tx_qlen;
 
 	unsigned		zlp:1;
@@ -1274,6 +1276,28 @@ static void rx_complete(struct usb_ep *ep, struct usb_request *req)
 	struct eth_dev	*dev = ep->driver_data;
 
 	debug("%s: status %d\n", __func__, req->status);
+	switch (req->status) {
+	/* normal completion */
+	case 0:
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += req->length;
+		break;
+
+	/* software-driven interface shutdown */
+	case -ECONNRESET:		/* unlink */
+	case -ESHUTDOWN:		/* disconnect etc */
+	/* for hardware automagic (such as pxa) */
+	case -ECONNABORTED:		/* endpoint reset */
+		break;
+
+	/* data overrun */
+	case -EOVERFLOW:
+		dev->stats.rx_over_errors++;
+		/* FALLTHROUGH */
+	default:
+		dev->stats.rx_errors++;
+		break;
+	}
 
 	packet_received = 1;
 }
@@ -1302,7 +1326,22 @@ fail1:
 
 static void tx_complete(struct usb_ep *ep, struct usb_request *req)
 {
+	struct eth_dev	*dev = ep->driver_data;
+
 	debug("%s: status %s\n", __func__, (req->status) ? "failed" : "ok");
+	switch (req->status) {
+	default:
+		dev->stats.tx_errors++;
+		debug("tx err %d\n", req->status);
+		/* FALLTHROUGH */
+	case -ECONNRESET:		/* unlink */
+	case -ESHUTDOWN:		/* disconnect etc */
+		break;
+	case 0:
+		dev->stats.tx_bytes += req->length;
+	}
+	dev->stats.tx_packets++;
+
 	packet_sent = 1;
 }
 
-- 
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