1 files changed, 8 insertions, 1 deletions

diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
index b01849a74310..1c0a50f13229 100644
--- a/net/bridge/br_stp.c
+++ b/net/bridge/br_stp.c
@@ -225,7 +225,14 @@ static void br_record_config_timeout_values(struct net_bridge *br,
 /* called under bridge lock */
 void br_transmit_tcn(struct net_bridge *br)
 {
-        br_send_tcn_bpdu(br_get_port(br, br->root_port));
+        struct net_bridge_port *p;
+
+        p = br_get_port(br, br->root_port);
+        if (p)
+                br_send_tcn_bpdu(p);
+        else
+                br_notice(br, "root port %u not found for topology notice\n",
+                          br->root_port);
 }
 
 /* called under bridge lock */