From: Wei Li <liwei391@xxxxxxxxxx> commit c9f2833cb472cf9e0a49b7bcdc210a96017a7bfd 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 cs_etm event is disabled, we don't enable it again here. Note: This patch is NOT tested since i don't have such a machine with coresight feature, but the code seems buggy same as arm-spe and intel-pt. Tester notes: Thanks for looping, Adrian. Applied this patch and tested with CoreSight on juno board, it works well. Signed-off-by: Wei Li <liwei391@xxxxxxxxxx> Reviewed-by: Leo Yan <leo.yan@xxxxxxxxxx> Reviewed-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> Tested-by: Leo Yan <leo.yan@xxxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Tan Xiaojun <tanxiaojun@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # 5.4+ Link: http://lore.kernel.org/lkml/20200214132654.20395-4-adrian.hunter@xxxxxxxxx [ahunter: removed redundant 'else' after 'return'] Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/perf/arch/arm/util/cs-etm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/tools/perf/arch/arm/util/cs-etm.c +++ b/tools/perf/arch/arm/util/cs-etm.c @@ -865,9 +865,12 @@ static int cs_etm_read_finish(struct aux struct evsel *evsel; evlist__for_each_entry(ptr->evlist, evsel) { - if (evsel->core.attr.type == ptr->cs_etm_pmu->type) + if (evsel->core.attr.type == ptr->cs_etm_pmu->type) { + if (evsel->disabled) + return 0; return perf_evlist__enable_event_idx(ptr->evlist, evsel, idx); + } } return -EINVAL;
