[PATCH net-next v4 07/14] net: bridge: mcast: track active state, own MLD querier disappearance

Linus Lüssing
2026-03-07T04:46:15Z

This change ensures that the new multicast active state variable is
immediately unset if our internal IGMP/MLD querier was elected and
now disabled.

If no IGMP/MLD querier exists on the link then we can't reliably receive
IGMP/MLD reports and in turn can't ensure the completeness of our MDB
anymore either.

No functional change for the fast/data path yet.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
---
net/bridge/br_multicast.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 2eebfb7c5ff9..f37a18f3713c 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -4945,6 +4945,7 @@ int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val)
#endif

unlock:
+ br_multicast_update_active(brmctx);
spin_unlock_bh(&brmctx->br->multicast_lock);

return 0;
--
2.53.0