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VLAN support is broken on MT7530/MT7531 switches (seen on the ASUS
ZenWiFi BT8): after a VLAN-aware bridge is destroyed, VLAN-unaware
bridges lose connectivity, and untagged PVID traffic does not reach
the bridge VLAN upper interface (br-lan.<vid>).
Backport two fixes from Linux v7.1:
- 2c4c76cacc9d ("net: dsa: mt7530: fix CPU port VLAN not being reset
to unaware")
- 4cb3cd670b2a ("net: dsa: mt7530: untag VLAN-aware bridge PVID")
Both patches apply cleanly to 6.18 and were refreshed with
make target/linux/refresh.
Fixes: https://github.com/openwrt/openwrt/issues/18576
Signed-off-by: Marc Strämke <marcstraemke@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/25247
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>