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realtek: dsa: Automatically return lost VLANs to CIST

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If a VLAN doesn't have any members anymore, then it is removed and
implicitly returns back from any MSTI to CIST. The DSA layer will not
create any call to .vlan_msti_set and the driver is required to handle this
directly.

Suggested-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Sven Eckelmann <se@simonwunderlich.de>
Link: https://github.com/openwrt/openwrt/pull/20421
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Sven Eckelmann 2025-10-28 08:55:38 +01:00 • committed by Hauke Mehrtens
parent 280cf19cdb
commit 2d14c1008e
1 changed files with 4 additions and 0 deletions
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4
target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/dsa.c
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@ -1819,6 +1819,10 @@ static int rtl83xx_vlan_del(struct dsa_switch *ds, int port,
info.untagged_ports &= (~BIT_ULL(port));
info.member_ports &= (~BIT_ULL(port));
/* VLANs without members are set back (implicitly) to CIST by DSA */
if (!info.member_ports)
info.fid = 0;
priv->r->vlan_set_untagged(vlan->vid, info.untagged_ports);
pr_debug("Untagged ports, VLAN %d: %llx\n", vlan->vid, info.untagged_ports);