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[PATCH v4 5/5] perf config: Autogenerate a config file if it does not exist on setting feature.

Currently the users can not create a config file
in the below case.


  $ rm -f ~/.perfconfig
  $ perf config --user report.children=false

  $ cat ~/.perfconfig
  cat: /root/.perfconfig: No such file or directory

But I think it should work no matter whether a config file exists or not.


  $ rm -f ~/.perfconfig
  $ perf config --user report.children=false

  $ cat ~/.perfconfig
  # this file is auto-generated.
      children = false

If not free config_set after perf_config_set__init() failed,
we can do that. The config set will be freed at the tail end.
(i.e. by perf_config_set__delete() at the end of cmd_config())

Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Signed-off-by: Taeung Song <treeze.taeung@xxxxxxxxx>
 tools/perf/util/config.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 8d724f0..1cc5d80 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -691,10 +691,7 @@ struct perf_config_set *perf_config_set__new(void)
 	if (set) {
-		if (perf_config_set__init(set) < 0) {
-			perf_config_set__delete(set);
-			set = NULL;
-		}
+		perf_config_set__init(set);
 	return set;