*/
extern const char *usb_speed_string(enum usb_device_speed speed);
+
+/**
+ * usb_state_string - Returns human readable name for the state.
+ * @state: The state to return a human-readable name for. If it's not
+ * any of the states devices in usb_device_state_string enum,
+ * the string UNKNOWN will be returned.
+ */
+extern const char *usb_state_string(enum usb_device_state state);
+
#endif /* __LINUX_USB_CH9_H */