More helpful error message.

api/etherbone.h

@@ -244,7 +244,7 @@ eb_status_t eb_socket_detach(eb_socket_t socket, eb_address_t address);
  * Return codes:
  *   OK		- the remote etherbone device is ready
  *   ADDRESS	- the network address could not be parsed
- *   FAIL	- the remote address did not identify itself as etherbone conformant
+ *   TIMEOUT    - the remote host did not respond with etherbone
  *   WIDTH      - could not negotiate an acceptable data bus width
  *   OOM        - out of memory
  */

api/glue/device.c

@@ -131,7 +131,7 @@ eb_status_t eb_device_open(eb_socket_t socketp, const char* address, eb_width_t
   if (device->widths == 0) {
     eb_device_close(devicep);
     *result = EB_NULL;
-    return EB_FAIL;
+    return EB_TIMEOUT;
   }
   
   device->widths &= proposed_widths;