From 7e1741b47f2441e7c570284d60ba936e3d41529a Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Sun, 25 Aug 2019 13:25:19 -0400 Subject: [PATCH] net: dsa: program VLAN on CPU port from slave DSA currently programs a VLAN on the CPU port implicitly after the related notifier is received by a switch. While we still need to do this transparent programmation of the DSA links in the fabric, programming the CPU port this way may cause problems in some corners such as the tag_8021q driver. Because the dedicated CPU port is specific to a slave, make their programmation explicit a few layers up, in the slave code. Note that technically, DSA links have a dedicated CPU port as well, but since they are only used as conduit between interconnected switches of a fabric, programming them transparently this way is what we want. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- net/dsa/slave.c | 14 ++++++++++++++ net/dsa/switch.c | 5 ++++- 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 82e48d247b81..8267c156a51a 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -332,6 +332,10 @@ static int dsa_slave_vlan_add(struct net_device *dev, if (err) return err; + err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans); + if (err) + return err; + return 0; } @@ -383,6 +387,9 @@ static int dsa_slave_vlan_del(struct net_device *dev, if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev)) return 0; + /* Do not deprogram the CPU port as it may be shared with other user + * ports which can be members of this VLAN as well. + */ return dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj)); } @@ -1121,6 +1128,10 @@ static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, if (ret && ret != -EOPNOTSUPP) return ret; + ret = dsa_port_vid_add(dp->cpu_dp, vid, 0); + if (ret && ret != -EOPNOTSUPP) + return ret; + return 0; } @@ -1151,6 +1162,9 @@ static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, if (ret == -EOPNOTSUPP) ret = 0; + /* Do not deprogram the CPU port as it may be shared with other user + * ports which can be members of this VLAN as well. + */ return ret; } diff --git a/net/dsa/switch.c b/net/dsa/switch.c index 489eb7b430a4..6a9607518823 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -232,7 +232,7 @@ static bool dsa_switch_vlan_match(struct dsa_switch *ds, int port, if (ds->index == info->sw_index && port == info->port) return true; - if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) + if (dsa_is_dsa_port(ds, port)) return true; return false; @@ -288,6 +288,9 @@ static int dsa_switch_vlan_del(struct dsa_switch *ds, if (ds->index == info->sw_index) return ds->ops->port_vlan_del(ds, info->port, info->vlan); + /* Do not deprogram the DSA links as they may be used as conduit + * for other VLAN members in the fabric. + */ return 0; } -- 2.30.2