perf: Fix initialization bug in parse_single_tracepoint_event()

The parse_single_tracepoint_event() was setting some attributes
before it validated the event was indeed a tracepoint event. This
caused problems with other initialization routines like in the
builtin-top.c module whereby sample_period is not set if not 0.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <4bcf232b.698fd80a.6fbe.ffffb737@mx.google.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 3b4ec6797565..600d32714257 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -418,12 +418,6 @@ parse_single_tracepoint_event(char *sys_name,
         u64 id;
         int fd;
 
-        attr->sample_type |= PERF_SAMPLE_RAW;
-        attr->sample_type |= PERF_SAMPLE_TIME;
-        attr->sample_type |= PERF_SAMPLE_CPU;
-
-        attr->sample_period = 1;
-
         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
                  sys_name, evt_name);
 
@@ -442,6 +436,13 @@ parse_single_tracepoint_event(char *sys_name,
         attr->type = PERF_TYPE_TRACEPOINT;
         *strp = evt_name + evt_length;
 
+        attr->sample_type |= PERF_SAMPLE_RAW;
+        attr->sample_type |= PERF_SAMPLE_TIME;
+        attr->sample_type |= PERF_SAMPLE_CPU;
+
+        attr->sample_period = 1;
+
+
         return EVT_HANDLED;
 }