1 files changed, 10 insertions, 6 deletions

diff --git a/trace-graph.c b/trace-graph.c
index 4e91fe8..7225880 100644
--- a/trace-graph.c
+++ b/trace-graph.c
@@ -1041,9 +1041,11 @@ int trace_graph_check_sched_wakeup(struct graph_info *ginfo,
 
         if (id == ginfo->event_wakeup_id) {
                 /* We only want those that actually woke up the task */
-                pevent_read_number_field(ginfo->wakeup_success_field, record->data, &val);
-                if (!val)
-                        return 0;
+                if (ginfo->wakeup_success_field) {
+                        pevent_read_number_field(ginfo->wakeup_success_field, record->data, &val);
+                        if (!val)
+                                return 0;
+                }
                 pevent_read_number_field(ginfo->wakeup_pid_field, record->data, &val);
                 if (pid)
                         *pid = val;
@@ -1052,9 +1054,11 @@ int trace_graph_check_sched_wakeup(struct graph_info *ginfo,
 
         if (id == ginfo->event_wakeup_new_id) {
                 /* We only want those that actually woke up the task */
-                pevent_read_number_field(ginfo->wakeup_new_success_field, record->data, &val);
-                if (!val)
-                        return 0;
+                if (ginfo->wakeup_new_success_field) {
+                        pevent_read_number_field(ginfo->wakeup_new_success_field, record->data, &val);
+                        if (!val)
+                                return 0;
+                }
                 pevent_read_number_field(ginfo->wakeup_new_pid_field, record->data, &val);
                 if (pid)
                         *pid = val;