[BRIDGE]: set features based on enslaved devices

Make features of the bridge pseudo-device be a subset of the underlying
devices.  Motivated by Xen and others who use bridging to do failover.

Signed-off-by: Catalin BOIE <catab at umrella.ro>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/net/bridge/br_notify.c b/net/bridge/br_notify.c
index f8fb49e3476..917311c6828 100644
--- a/net/bridge/br_notify.c
+++ b/net/bridge/br_notify.c
@@ -65,6 +65,15 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
                 }
                 break;
 
+        case NETDEV_FEAT_CHANGE:
+                if (br->dev->flags & IFF_UP) 
+                        br_features_recompute(br);
+
+                /* could do recursive feature change notification
+                 * but who would care?? 
+                 */
+                break;
+
         case NETDEV_DOWN:
                 if (br->dev->flags & IFF_UP)
                         br_stp_disable_port(p);