All hists test cases forget to reset err after using it to hold an
error code. If error occure in setup_fake_machine() it incorrectly
return TEST_OK.

This patch fixes it.

Signed-off-by: Wang Nan <[email protected]>
Suggested-by: Namhyung Kim <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Namhyung Kim <[email protected]>
---
 tools/perf/tests/hists_cumulate.c | 1 +
 tools/perf/tests/hists_filter.c   | 1 +
 tools/perf/tests/hists_link.c     | 1 +
 tools/perf/tests/hists_output.c   | 1 +
 4 files changed, 4 insertions(+)

diff --git a/tools/perf/tests/hists_cumulate.c 
b/tools/perf/tests/hists_cumulate.c
index 8292948..76f8922 100644
--- a/tools/perf/tests/hists_cumulate.c
+++ b/tools/perf/tests/hists_cumulate.c
@@ -706,6 +706,7 @@ int test__hists_cumulate(int subtest __maybe_unused)
        err = parse_events(evlist, "cpu-clock", NULL);
        if (err)
                goto out;
+       err = TEST_FAIL;
 
        machines__init(&machines);
 
diff --git a/tools/perf/tests/hists_filter.c b/tools/perf/tests/hists_filter.c
index ccb5b49..2cd91df 100644
--- a/tools/perf/tests/hists_filter.c
+++ b/tools/perf/tests/hists_filter.c
@@ -120,6 +120,7 @@ int test__hists_filter(int subtest __maybe_unused)
        err = parse_events(evlist, "task-clock", NULL);
        if (err)
                goto out;
+       err = TEST_FAIL;
 
        /* default sort order (comm,dso,sym) will be used */
        if (setup_sorting() < 0)
diff --git a/tools/perf/tests/hists_link.c b/tools/perf/tests/hists_link.c
index 6243e2b..4dd8f4e 100644
--- a/tools/perf/tests/hists_link.c
+++ b/tools/perf/tests/hists_link.c
@@ -293,6 +293,7 @@ int test__hists_link(int subtest __maybe_unused)
        if (err)
                goto out;
 
+       err = TEST_FAIL;
        /* default sort order (comm,dso,sym) will be used */
        if (setup_sorting() < 0)
                goto out;
diff --git a/tools/perf/tests/hists_output.c b/tools/perf/tests/hists_output.c
index 248beec..dc7bf56 100644
--- a/tools/perf/tests/hists_output.c
+++ b/tools/perf/tests/hists_output.c
@@ -597,6 +597,7 @@ int test__hists_output(int subtest __maybe_unused)
        err = parse_events(evlist, "cpu-clock", NULL);
        if (err)
                goto out;
+       err = TEST_FAIL;
 
        machines__init(&machines);
 
-- 
1.8.3.4

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