[PATCH 1/1] bridge: turn off carrier when the bridge is created

[Zhu Yanjun <Yanjun.Zhu@windriver.com>]

When a bridge interface is created, there is no any sub interface
in it. In this case, the packets should not go to this bridge interface.
As such, carrier is turned off.

CC: David Ahern <dsahern@gmail.com>
Suggested-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Zhu Yanjun <Yanjun.Zhu@windriver.com>
---
 net/bridge/br_device.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index ffd379d..fcc4794 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -394,4 +394,8 @@ void br_dev_setup(struct net_device *dev)
 	br_netfilter_rtable_init(br);
 	br_stp_timer_init(br);
 	br_multicast_init(br);
+
+	/* Shutdown bridge to avoid packets */
+	if (netif_carrier_ok(dev))
+		netif_carrier_off(dev);
 }
-- 
1.9.1