When STP is running in user-space and querier is configured, the
querier timer is not started when a port goes to a non-blocking state.
This patch unifies the user- and kernel-space stp multicast port enable
path and enables it in all states different from blocking. Note that when a
port goes in BR_STATE_DISABLED it's not enabled because that is handled
in the beginning of the port list loop.

Signed-off-by: Nikolay Aleksandrov <niko...@cumulusnetworks.com>
---
v2: Repurposed for net-next and implemented Herbert's suggestion for
    unifying both user- and kernel-space multicast enable port paths.

 net/bridge/br_stp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
index 45f1ff113af9..e7ab74b405a1 100644
--- a/net/bridge/br_stp.c
+++ b/net/bridge/br_stp.c
@@ -428,7 +428,6 @@ static void br_make_forwarding(struct net_bridge_port *p)
        else
                br_set_state(p, BR_STATE_LEARNING);
 
-       br_multicast_enable_port(p);
        br_log_state(p);
        br_ifinfo_notify(RTM_NEWLINK, p);
 
@@ -462,6 +461,8 @@ void br_port_state_selection(struct net_bridge *br)
                        }
                }
 
+               if (p->state != BR_STATE_BLOCKING)
+                       br_multicast_enable_port(p);
                if (p->state == BR_STATE_FORWARDING)
                        ++liveports;
        }
-- 
2.4.3

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