perf parse-events: Set pmu_name whenever a pmu is given

Change add_event to always set pmu_name when possible as not all code
checks both pmu->name and evsel->pmu_name, for example,
uniquify_counter in stat-display.c.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ahmad Yasin <ahmad.yasin@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Edward Baker <edward.baker@intel.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kang Minchul <tegongkang@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Samantha Alt <samantha.alt@intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20230502223851.2234828-17-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/parse-events.c

@@ -269,6 +269,7 @@ __add_event(struct list_head *list, int *idx,
 	evsel->core.requires_cpu = pmu ? pmu->is_uncore : false;
 	evsel->auto_merge_stats = auto_merge_stats;
 	evsel->pmu = pmu;
+	evsel->pmu_name = pmu && pmu->name ? strdup(pmu->name) : NULL;
 
 	if (name)
 		evsel->name = strdup(name);
@@ -1500,12 +1501,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
 				    /*metric_id=*/NULL, pmu,
 				    /*config_terms=*/NULL, auto_merge_stats,
 				    /*cpu_list=*/NULL);
-		if (evsel) {
-			evsel->pmu_name = name ? strdup(name) : NULL;
-			return 0;
-		} else {
-			return -ENOMEM;
-		}
+		return evsel ? 0 : -ENOMEM;
 	}
 
 	if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
@@ -1561,7 +1557,6 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
 	if (evsel->name)
 		evsel->use_config_name = true;
 
-	evsel->pmu_name = name ? strdup(name) : NULL;
 	evsel->percore = config_term_percore(&evsel->config_terms);
 
 	if (parse_state->fake_pmu)