void (*port_reconfigured)(struct ofport *ofport,
enum ofputil_port_config old_config);
- /* Looks up a port named 'devname' in 'ofproto'. On success, initializes
- * '*port' appropriately.
+ /* Looks up a port named 'devname' in 'ofproto'. On success, returns 0 and
+ * initializes '*port' appropriately. Otherwise, returns a positive errno
+ * value.
*
* The caller owns the data in 'port' and must free it with
* ofproto_port_destroy() when it is no longer needed. */