diff mbox series

[v6,net-next,6/7] net: bridge: guard the switchdev replay helpers against a NULL notifier block

Message ID 20210721162403.1988814-7-vladimir.oltean@nxp.com
State New
Headers show
Series Let switchdev drivers offload and unoffload bridge ports at their own convenience | expand

Commit Message

Vladimir Oltean July 21, 2021, 4:24 p.m. UTC 
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 <vladimir.oltean@nxp.com>
---
 net/bridge/br_fdb.c  | 3 +++
 net/bridge/br_mdb.c  | 3 +++
 net/bridge/br_vlan.c | 3 +++
 3 files changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 2b862cffc03a..47f190b6bfa3 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -760,6 +760,9 @@  int br_fdb_replay(const struct net_device *br_dev, const struct net_device *dev,
 	unsigned long action;
 	int err = 0;
 
+	if (!nb)
+		return 0;
+
 	if (!netif_is_bridge_master(br_dev))
 		return -EINVAL;
 
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index d3383a47a2f2..09358c475787 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;
 
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index e66b004df763..45ef07f682f1 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -1856,6 +1856,9 @@  int br_vlan_replay(struct net_device *br_dev, struct net_device *dev,
 
 	ASSERT_RTNL();
 
+	if (!nb)
+		return 0;
+
 	if (!netif_is_bridge_master(br_dev))
 		return -EINVAL;