From: Vivien Didelot Date: Sun, 25 Aug 2019 17:25:20 +0000 (-0400) Subject: net: dsa: clear VLAN PVID flag for CPU port X-Git-Tag: v5.4-rc1~131^2~144^2 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=b9499904f363342f56fd2039605aac9f7388e795;p=linux.git net: dsa: clear VLAN PVID flag for CPU port When the bridge offloads a VLAN on a slave port, we also need to program its dedicated CPU port as a member of the VLAN. Drivers may handle the CPU port's membership as they want. For example, Marvell as a special "Unmodified" mode to pass frames as is through such ports. Even though DSA expects the drivers to handle the CPU port membership, it does not make sense to program user VLANs as PVID on the CPU port. This patch clears this flag before programming the CPU port. Signed-off-by: Vivien Didelot Suggested-by: Vladimir Oltean Signed-off-by: David S. Miller --- diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 8267c156a51a..d84225125099 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -332,6 +332,12 @@ static int dsa_slave_vlan_add(struct net_device *dev, if (err) return err; + /* We need the dedicated CPU port to be a member of the VLAN as well. + * Even though drivers often handle CPU membership in special ways, + * it doesn't make sense to program a PVID, so clear this flag. + */ + vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; + err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans); if (err) return err;