[Bridge] [RFC PATCH v3 net-next 10/24] net: prestera: guard against multiple switchdev obj replays on same bridge port

Vladimir Oltean vladimir.oltean at nxp.com
Mon Jul 12 15:21:28 UTC 2021


Prepare the prestera driver, which supports LAG offload, to deal with
bridge switchdev objects being replayed on the LAG bridge port multiple
times, once for each time a physical port beneath the LAG calls
switchdev_bridge_port_offload().

Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>
---
 drivers/net/ethernet/marvell/prestera/prestera_switchdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c b/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c
index ae117104a23a..4be82c043991 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_switchdev.c
@@ -1074,6 +1074,9 @@ static int prestera_port_obj_add(struct net_device *dev, const void *ctx,
 	struct prestera_port *port = netdev_priv(dev);
 	const struct switchdev_obj_port_vlan *vlan;
 
+	if (ctx && ctx != port)
+		return 0;
+
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
@@ -1110,6 +1113,9 @@ static int prestera_port_obj_del(struct net_device *dev, const void *ctx,
 {
 	struct prestera_port *port = netdev_priv(dev);
 
+	if (ctx && ctx != port)
+		return 0;
+
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		return prestera_port_vlans_del(port, SWITCHDEV_OBJ_PORT_VLAN(obj));
-- 
2.25.1



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