--- zzzz-none-000/linux-2.6.32.60/drivers/net/usb/usbnet.c	2012-10-07 21:41:24.000000000 +0000
+++ ur8-7270-606/linux-2.6.32.60/drivers/net/usb/usbnet.c	2013-02-12 11:22:19.000000000 +0000
@@ -962,7 +962,8 @@
 	struct usbnet		*dev = entry->dev;
 
 	if (urb->status == 0) {
-		dev->net->stats.tx_packets++;
+		if (!(dev->driver_info->flags & FLAG_MULTI_PACKET))
+			dev->net->stats.tx_packets++;
 		dev->net->stats.tx_bytes += entry->length;
 	} else {
 		dev->net->stats.tx_errors++;
@@ -1033,9 +1034,13 @@
 	if (info->tx_fixup) {
 		skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
 		if (!skb) {
-			if (netif_msg_tx_err (dev))
+			if (netif_msg_tx_err (dev)) {
 				devdbg (dev, "can't tx_fixup skb");
-			goto drop;
+				goto drop;
+			} else {
+				/* cdc_ncm collected packet; waits for more */
+				goto not_drop;
+			}
 		}
 	}
 	length = skb->len;
@@ -1058,13 +1063,21 @@
 	/* don't assume the hardware handles USB_ZERO_PACKET
 	 * NOTE:  strictly conforming cdc-ether devices should expect
 	 * the ZLP here, but ignore the one-byte packet.
+	 * NOTE2: CDC NCM specification is different from CDC ECM when
+	 * handling ZLP/short packets, so cdc_ncm driver will make short
+	 * packet itself if needed.
 	 */
-	if (!(info->flags & FLAG_SEND_ZLP) && (length % dev->maxpacket) == 0) {
-		urb->transfer_buffer_length++;
-		if (skb_tailroom(skb)) {
-			skb->data[skb->len] = 0;
-			__skb_put(skb, 1);
-		}
+	if (length % dev->maxpacket == 0) {
+		if (!(info->flags & FLAG_SEND_ZLP)) {
+			if (!(info->flags & FLAG_MULTI_PACKET)) {
+				urb->transfer_buffer_length++;
+				if (skb_tailroom(skb)) {
+					skb->data[skb->len] = 0;
+					__skb_put(skb, 1);
+				}
+			}
+		} else
+			urb->transfer_flags |= URB_ZERO_PACKET;
 	}
 
 	spin_lock_irqsave (&dev->txq.lock, flags);
@@ -1091,6 +1104,7 @@
 			devdbg (dev, "drop, code %d", retval);
 drop:
 		dev->net->stats.tx_dropped++;
+not_drop:
 		if (skb)
 			dev_kfree_skb_any (skb);
 		usb_free_urb (urb);