1 files changed, 13 insertions, 9 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 60d3aac49ed4..376a2e1ac00d 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -79,17 +79,19 @@ struct wireless_dev;
 #define net_xmit_eval(e)        ((e) == NET_XMIT_CN? 0 : (e))
 #define net_xmit_errno(e)       ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
 
+/* Driver transmit return codes */
+enum netdev_tx {
+        NETDEV_TX_OK = 0,       /* driver took care of packet */
+        NETDEV_TX_BUSY,         /* driver tx path was busy*/
+        NETDEV_TX_LOCKED = -1,  /* driver tx lock was already taken */
+};
+typedef enum netdev_tx netdev_tx_t;
+
 #endif
 
 #define MAX_ADDR_LEN    32              /* Largest hardware address length */
 
-/* Driver transmit return codes */
-#define NETDEV_TX_OK 0          /* driver took care of packet */
-#define NETDEV_TX_BUSY 1        /* driver tx path was busy*/
-#define NETDEV_TX_LOCKED -1     /* driver tx lock was already taken */
-
 #ifdef  __KERNEL__
-
 /*
  *      Compute the worst case header length according to the protocols
  *      used.
@@ -507,9 +509,11 @@ struct netdev_queue {
  *     This function is called when network device transistions to the down
  *     state.
  *
- * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
+ * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
+ *                               struct net_device *dev);
  *      Called when a packet needs to be transmitted.
- *      Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
+ *      Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
+ *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
  *      Required can not be NULL.
  *
  * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
@@ -580,7 +584,7 @@ struct net_device_ops {
         void                    (*ndo_uninit)(struct net_device *dev);
         int                     (*ndo_open)(struct net_device *dev);
         int                     (*ndo_stop)(struct net_device *dev);
-        int                     (*ndo_start_xmit) (struct sk_buff *skb,
+        netdev_tx_t             (*ndo_start_xmit) (struct sk_buff *skb,
                                                    struct net_device *dev);
         u16                     (*ndo_select_queue)(struct net_device *dev,
                                                     struct sk_buff *skb);