--- ../../linux-2.6.29.4/include/linux/usb/usbnet.h	2009-05-19 07:52:34.000000000 +0800
+++ usbnet.h	2009-06-08 13:27:16.000000000 +0800
@@ -48,11 +48,15 @@
 	u32			xid;
 	u32			hard_mtu;	/* count any extra framing */
 	size_t			rx_urb_size;	/* size for rx urbs */
+	size_t			tx_threshold;
 	struct mii_if_info	mii;
 
 	/* various kinds of pending driver work */
 	struct sk_buff_head	rxq;
 	struct sk_buff_head	txq;
+	struct sk_buff_head	tx_waitq;
+	u32			tx_wait_bytes;
+	u32			tx_busy_pkt;
 	struct sk_buff_head	done;
 	struct urb		*interrupt;
 	struct tasklet_struct	bh;
@@ -114,6 +118,10 @@
 	struct sk_buff	*(*tx_fixup)(struct usbnet *dev,
 				struct sk_buff *skb, gfp_t flags);
 
+	/* aggregate tx packets */
+	struct sk_buff	*(*tx_gather)(struct usbnet *dev,
+				struct sk_buff_head *q, size_t *actual_len);
+
 	/* early initialization code, can sleep. This is for minidrivers
 	 * having 'subminidrivers' that need to do extra initialization
 	 * right after minidriver have initialized hardware. */
@@ -174,6 +182,7 @@
 	struct usbnet		*dev;
 	enum skb_state		state;
 	size_t			length;
+	size_t			pkt_cnt;
 };