net: dsa: b53: do not allow to configure VLAN 0

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Since we cannot set forwarding destinations per VLAN, we should not have
a VLAN 0 configured, as it would allow untagged traffic to work across
ports on VLAN aware bridges regardless if a PVID untagged VLAN exists.

So remove the VLAN 0 on join, an re-add it on leave. But only do so if
we have a VLAN aware bridge, as without it, untagged traffic would
become tagged with VID 0 on a VLAN unaware bridge.

Fixes: a2482d2ce3 ("net: dsa: b53: Plug in VLAN support")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20250429201710.330937-8-jonas.gorski@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Jonas Gorski 2025-04-29 22:17:06 +02:00 • committed by Jakub Kicinski

parent 13b152ae40

commit 45e9d59d39

1 changed files with 27 additions and 9 deletions

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drivers/net/dsa/b53/b53_common.c

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