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    SubjectRe: 2.6.37 regression: adding main interface to a bridge breaks vlan interface RX
    Date
    I created a Bugzilla entry at 
    https://bugzilla.kernel.org/show_bug.cgi?id=27432
    for your bug report, please add your address to the CC list in there, thanks!

    On niedziela, 16 stycznia 2011 o 15:09:32 Simon Arlott wrote:
    > [ 1.666706] forcedeth 0000:00:08.0: ifname eth0, PHY OUI 0x5043 @ 16,
    > addr 00:e0:81:4d:2b:ec [ 1.666767] forcedeth 0000:00:08.0: highdma csum
    > vlan pwrctl mgmt gbit lnktim msi desc-v3
    >
    > I have eth0 and eth0.3840 which works until I add eth0 to a bridge.
    > While eth0 is in a bridge (the bridge device is up), eth0.3840 is unable
    > to receive packets. Using tcpdump on eth0 shows the packets being
    > received with a VLAN tag but they don't appear on eth0.3840. They appear
    > with the VLAN tag on the bridge interface.
    >
    > If I remove eth0 from the bridge, eth0.3840 starts working again. It
    > still works if eth0.3840 is part of a bridge but eth0 isn't (the device
    > is in promiscuous mode). I've only tested with broadcast traffic.
    >
    > This works with 2.6.36.
    >
    > git bisect produces 3701e51382a026cba10c60b03efabe534fba4ca4 as the
    > first bad commit.
    >
    > The behaviour of drivers/net/forcedeth.c nv_rx_process_optimized looks
    > ok - vlan_gro_receive and napi_gro_receive are called correctly. (The
    > likely(!np->vlangrp) looks odd as it'll always be false if vlans are in
    > use).

    --
    Maciej Rutecki
    http://www.maciek.unixy.pl


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