[PATCH 03/19] perf tools: Fix parsing of pmu events with empty list of modifiers

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <a...@redhat.com>

In 1d55e8ef340d ("perf tools: Introduce opt_event_config nonterminal") I
removed the unconditional "'/' '/'" for pmu events such as
"intel_pt//" but forgot to use opt_event_config where it expected some
event_config, oops. Fix it.

Noticed when trying to use:

  # perf record -e intel_pt// -a sleep 1
  event syntax error: 'intel_pt//'
                               \___ parser error
  Run 'perf list' for a list of valid events

   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

      -e, --event <event>   event selector. use 'perf list' to list available 
events
  #

Cc: Adrian Hunter <adrian.hun...@intel.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Wang Nan <wangn...@huawei.com>
Fixes: 1d55e8ef340d ("perf tools: Introduce opt_event_config nonterminal")
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
 tools/perf/util/parse-events.y | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index d1fbcabbe70d..85c44ba79cad 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -217,14 +217,14 @@ event_def: event_pmu |
           event_bpf_file
 
 event_pmu:
-PE_NAME '/' event_config '/'
+PE_NAME opt_event_config
 {
        struct parse_events_evlist *data = _data;
        struct list_head *list;
 
        ALLOC_LIST(list);
-       ABORT_ON(parse_events_add_pmu(data, list, $1, $3));
-       parse_events_terms__delete($3);
+       ABORT_ON(parse_events_add_pmu(data, list, $1, $2));
+       parse_events_terms__delete($2);
        $$ = list;
 }
 |
-- 
2.5.0