bridge: add some comments for NETDEV_RELEASE

Add comments on why we don't notify NETDEV_RELEASE.

Cc: David Miller <davem@davemloft.net>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 171fd6b..1c8fdc3 100644 (file)
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -427,6 +427,10 @@ int br_del_if(struct net_bridge *br, struct net_device *dev)
        if (!p || p->br != br)
                return -EINVAL;
 
+       /* Since more than one interface can be attached to a bridge,
+        * there still maybe an alternate path for netconsole to use;
+        * therefore there is no reason for a NETDEV_RELEASE event.
+        */
        del_nbp(p);
 
        spin_lock_bh(&br->lock);