usbnet: changes for upcoming cdc_ncm driver

Changes:
include/linux/usb/usbnet.h:
- a new flag to indicate driver's capability to accumulate IP packets in Tx
 direction and extract several packets from single skb in Rx direction.
drivers/net/usb/usbnet.c:
- the procedure of counting packets in usbnet was updated due to the
 accumulating of IP packets in the driver
- no short packets are sent if indicated by the flag in driver_info
 structure

Signed-off-by: Alexey Orishko <alexey.orishko@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 7ae27a473818..44842c8d38c0 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -97,6 +97,12 @@ struct driver_info {
 
 #define FLAG_LINK_INTR  0x0800          /* updates link (carrier) status */
 
+/*
+ * Indicates to usbnet, that USB driver accumulates multiple IP packets.
+ * Affects statistic (counters) and short packet handling.
+ */
+#define FLAG_MULTI_PACKET       0x1000
+
         /* init device ... can sleep, or cause probe() failure */
         int     (*bind)(struct usbnet *, struct usb_interface *);