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Subject[PATCH 5.4 095/168] perf arm-spe: Fix endless record after being terminated
Date
From: Adrian Hunter <adrian.hunter@intel.com>

commit d6bc34c5ec18c3544c4b0d85963768dfbcd24184 upstream.

In __cmd_record(), when receiving SIGINT(ctrl + c), a 'done' flag will
be set and the event list will be disabled by evlist__disable() once.

While in auxtrace_record.read_finish(), the related events will be
enabled again, if they are continuous, the recording seems to be
endless.

If the event is disabled, don't enable it again here.

Based-on-patch-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Tan Xiaojun <tanxiaojun@huawei.com>
Cc: stable@vger.kernel.org # 5.4+
Link: http://lore.kernel.org/lkml/20200214132654.20395-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
tools/perf/arch/arm64/util/arm-spe.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

--- a/tools/perf/arch/arm64/util/arm-spe.c
+++ b/tools/perf/arch/arm64/util/arm-spe.c
@@ -165,9 +165,12 @@ static int arm_spe_read_finish(struct au
struct evsel *evsel;

evlist__for_each_entry(sper->evlist, evsel) {
- if (evsel->core.attr.type == sper->arm_spe_pmu->type)
+ if (evsel->core.attr.type == sper->arm_spe_pmu->type) {
+ if (evsel->disabled)
+ return 0;
return perf_evlist__enable_event_idx(sper->evlist,
evsel, idx);
+ }
}
return -EINVAL;
}

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