- * @get_addr: Get the device's MAC address.
- * @get_config: Get the device's configuration.
- * @get_kobj: Get the kobj associated with the device (may return null).
- * @get_dev_flags: Get the device's flags.
- * @is_running: Checks whether the device is running.
- * @get_operstate: Get the device's operating state.
- * @get_ifindex: Get the system interface index associated with the device.
- * May be null if the device does not have an ifindex.
- * @get_mtu: Get the device's MTU. May be %NULL if the device does not have an
- * MTU (as e.g. some tunnels do not). Must be implemented if @get_ifindex is
- * implemented.
- * @send: Send a packet on the device. Returns the length of the packet sent.
+ * @send: Send a packet on the device. Returns the length of the packet sent,
+ * zero for dropped packets or negative for error.