netdev - [RFC PATCH v3 net-next 11/24] net: mlxsw: guard against multiple switchdev obj replays on same bridge port

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Message-Id: <20210712152142.800651-12-vladimir.oltean@nxp.com>
Date:   Mon, 12 Jul 2021 18:21:29 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ido Schimmel <idosch@...sch.org>,
        Tobias Waldekranz <tobias@...dekranz.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        bridge@...ts.linux-foundation.org,
        Grygorii Strashko <grygorii.strashko@...com>
Subject: [RFC PATCH v3 net-next 11/24] net: mlxsw: guard against multiple switchdev obj replays on same bridge port

Prepare the mlxsw 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@....com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
index cbcf38338f3e..9f72912e4982 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
@@ -1774,6 +1774,9 @@ static int mlxsw_sp_port_obj_add(struct net_device *dev, const void *ctx,
 	const struct switchdev_obj_port_vlan *vlan;
 	int err = 0;
 
+	if (ctx && ctx != mlxsw_sp_port)
+		return 0;
+
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
@@ -1922,6 +1925,9 @@ static int mlxsw_sp_port_obj_del(struct net_device *dev, const void *ctx,
 	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
 	int err = 0;
 
+	if (ctx && ctx != mlxsw_sp_port)
+		return 0;
+
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = mlxsw_sp_port_vlans_del(mlxsw_sp_port,
-- 
2.25.1