diff --git a/[refs] b/[refs]
index 09417de17d41..9305b1a3bb87 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4a2b8dda3f8705880ec7408135645602d5590f51
+refs/heads/master: 42fab4b2cdc02cf28e2474ccfd75bc9225076590
diff --git a/trunk/kernel/trace/trace_stat.c b/trunk/kernel/trace/trace_stat.c
index cb29282b9485..2110cea2ece3 100644
--- a/trunk/kernel/trace/trace_stat.c
+++ b/trunk/kernel/trace/trace_stat.c
@@ -73,8 +73,10 @@ int register_stat_tracer(struct tracer_stat *trace)
 	/* Already registered? */
 	mutex_lock(&all_stat_sessions_mutex);
 	list_for_each_entry_safe(node, tmp, &all_stat_sessions, session_list) {
-		if (node->ts == trace)
+		if (node->ts == trace) {
+			mutex_unlock(&all_stat_sessions_mutex);
 			return -EINVAL;
+		}
 	}
 	mutex_unlock(&all_stat_sessions_mutex);