[PATCH 1/3] tracing: Add missing nest end to synth_event_trace_start() error case

[Tom Zanussi]

If the ring_buffer reserve in synth_event_trace_start() fails, the
matching ring_buffer_nest_end() should be called in the error code,
since nothing else will ever call it in this case.

Signed-off-by: Tom Zanussi <zanussi@xxxxxxxxxx>
---
 kernel/trace/trace_events_hist.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index b3bcfd8c7332..a546ffa14785 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -2043,6 +2043,7 @@ int synth_event_trace_start(struct trace_event_file *file,
 	entry = trace_event_buffer_reserve(&trace_state->fbuffer, file,
 					   sizeof(*entry) + fields_size);
 	if (!entry) {
+		ring_buffer_nest_end(trace_state->buffer);
 		ret = -EINVAL;
 		goto out;
 	}
-- 
2.14.1