From 3fd6ef29e72aae6eb16e2e0bae7b599ddf6062b9 Mon Sep 17 00:00:00 2001
From: Ethan Jackson <ethan@nicira.com>
Date: Wed, 21 Aug 2013 12:59:28 -0700
Subject: [PATCH] netdev: Make run and wait functions optional as documented.

Signed-off-by: Ethan Jackson <ethan@nicira.com>
Reported-by: Guolin Yang <gyang@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
---
 lib/netdev.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/netdev.c b/lib/netdev.c
index 088aea907..bf942a0f4 100644
--- a/lib/netdev.c
+++ b/lib/netdev.c
@@ -126,7 +126,9 @@ netdev_run(void)
 
     ovs_rwlock_rdlock(&netdev_class_rwlock);
     HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
-        rc->class->run();
+        if (rc->class->run) {
+            rc->class->run();
+        }
     }
     ovs_rwlock_unlock(&netdev_class_rwlock);
 }
@@ -143,7 +145,9 @@ netdev_wait(void)
 
     ovs_rwlock_rdlock(&netdev_class_rwlock);
     HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
-        rc->class->wait();
+        if (rc->class->wait) {
+            rc->class->wait();
+        }
     }
     ovs_rwlock_unlock(&netdev_class_rwlock);
 }
-- 
2.47.0