From 7105b50b7eecae62cf6175507f9ea9ff60a55816 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Wed, 21 Jul 2021 19:24:02 +0300 Subject: net: bridge: guard the switchdev replay helpers against a NULL notifier block There is a desire to make the object and FDB replay helpers optional when moving them inside the bridge driver. For example a certain driver might not offload host MDBs and there is no case where the replay helpers would be of immediate use to it. So it would be nice if we could allow drivers to pass NULL pointers for the atomic and blocking notifier blocks, and the replay helpers to do nothing in that case. Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- net/bridge/br_mdb.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/bridge/br_mdb.c') diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c index 25d690b96cec..e58f1a4ac962 100644 --- a/net/bridge/br_mdb.c +++ b/net/bridge/br_mdb.c @@ -617,6 +617,9 @@ int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, ASSERT_RTNL(); + if (!nb) + return 0; + if (!netif_is_bridge_master(br_dev) || !netif_is_bridge_port(dev)) return -EINVAL; -- cgit