• Russell King's avatar
    net: dsa: provide an option for drivers to always receive bridge VLANs · 54a0ed0d
    Russell King authored
    DSA assumes that a bridge which has vlan filtering disabled is not
    vlan aware, and ignores all vlan configuration. However, the kernel
    software bridge code allows configuration in this state.
    
    This causes the kernel's idea of the bridge vlan state and the
    hardware state to disagree, so "bridge vlan show" indicates a correct
    configuration but the hardware lacks all configuration. Even worse,
    enabling vlan filtering on a DSA bridge immediately blocks all traffic
    which, given the output of "bridge vlan show", is very confusing.
    
    Provide an option that drivers can set to indicate they want to receive
    vlan configuration even when vlan filtering is disabled. At the very
    least, this is safe for Marvell DSA bridges, which do not look up
    ingress traffic in the VTU if the port is in 8021Q disabled state. It is
    also safe for the Ocelot switch family. Whether this change is suitable
    for all DSA bridges is not known.
    Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
    Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
    Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    54a0ed0d
port.c 18.3 KB