Subject: [PATCH 1/2] bridge: leave carrier on for empty bridge

From: Stephen Hemminger <[email-masked]>
Date: Fri, 02 Sep 2011 10:22:21 -0700

This resolves a regression seen by some users of bridging.
Some users use the bridge like a dummy device. 
They expect to be able to put an IPv6 address on the device
with no ports attached during boot.

Note: the bridge still will reflect the state of ports in the
bridge if there are any added.

Signed-off-by: Stephen Hemminger <[email-masked]>

---
This fix needs to go to stable for 3.0 and 2.6.39

--- a/net/bridge/br_device.c	2011-09-01 08:52:27.596631192 -0700
+++ b/net/bridge/br_device.c	2011-09-01 09:01:03.256611801 -0700
@@ -91,7 +91,6 @@ static int br_dev_open(struct net_device
 {
 	struct net_bridge *br = netdev_priv(dev);
 
-	netif_carrier_off(dev);
 	netdev_update_features(dev);
 	netif_start_queue(dev);
 	br_stp_enable_bridge(br);
@@ -108,8 +107,6 @@ static int br_dev_stop(struct net_device
 {
 	struct net_bridge *br = netdev_priv(dev);
 
-	netif_carrier_off(dev);
-
 	br_stp_disable_bridge(br);
 	br_multicast_stop(br);