From: DENG Qingfang <dqf...@gmail.com>
Date: Wed, 13 May 2020 23:37:17 +0800
> Currently, setting a bridge's self PVID to other value and deleting
> the default VID 1 renders untagged ports of that VLAN unable to talk to
> the CPU port:
>
> bridge vlan add dev br0 vid 2 pvid untagged self
> bridge vlan del dev br0 vid 1 self
> bridge vlan add dev sw0p0 vid 2 pvid untagged
> bridge vlan del dev sw0p0 vid 1
> # br0 cannot send untagged frames out of sw0p0 anymore
>
> That is because the CPU port is set to security mode and its PVID is
> still 1, and untagged frames are dropped due to VLAN member violation.
>
> Set the CPU port to fallback mode so untagged frames can pass through.
>
> Fixes: 83163f7dca56 ("net: dsa: mediatek: add VLAN support for MT7530")
> Signed-off-by: DENG Qingfang <dqf...@gmail.com>
Applied to net-next, thanks.
