The CPU port of realtek switches needs some proper PVID set to handle
untagged packets. Because the ethernet driver does no special VLAN
handling (see CPU tag RVID/RVID_SEL) as of now we can only steer
untagged packets by setting PVID for the CPU port. VLAN handling has
never been perfect but 3 events made things worse.
- Commit a376508216 ("rtl83xx: dsa: Do nothing when vid 0")
- Commit e691e2b302 ("rtl83xx: dsa: reset PVID to 1 instead of 0")
- Upgrade to kernel 6.6
Reasons are:
- Rejecting VID 0 disabled Linux initialization routines
- Initialization for PVID forgot to set priv->ports[port].pvid
- Kernel 6.6 does no longer clarify CPU port as untagged
To fix this prepare the VID 0 setup inside the driver. Join all ports
to VID 0 and let no one from outsinde interfere with this setup.
Especially ignore PVID settings for the CPU port for all further
VLAN commands.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Suggested-by: Bjørn Mork <bjorn@mork.no>
a22d359fa5