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| author | Ian Rogers <irogers@google.com> | 2020-05-20 11:20:06 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-05-28 10:03:28 -0300 |
| commit | 908103991a9970a8e033e9f3aedd092a2c993f49 (patch) | |
| tree | a599b9375635e764879ad56ac70754f1320dcd1e /tools/perf | |
| parent | 4e21c13aca38b69c4470b68ef29d198802e7d74e (diff) | |
| download | linux-908103991a9970a8e033e9f3aedd092a2c993f49.tar.gz linux-908103991a9970a8e033e9f3aedd092a2c993f49.tar.bz2 linux-908103991a9970a8e033e9f3aedd092a2c993f49.zip | |
perf metricgroup: Use early return in add_metric
Use early return in metricgroup__add_metric and try to make the intent
of the returns more intention revealing.
Suggested-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200520182011.32236-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/metricgroup.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c index 0798658592d9..70f3f92a3262 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -527,7 +527,8 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events, { struct pmu_events_map *map = perf_pmu__find_map(NULL); struct pmu_event *pe; - int i, ret = -EINVAL; + int i, ret; + bool has_match = false; if (!map) return 0; @@ -535,17 +536,23 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events, for (i = 0; ; i++) { pe = &map->table[i]; - if (!pe->name && !pe->metric_group && !pe->metric_name) + if (!pe->name && !pe->metric_group && !pe->metric_name) { + /* End of pmu events. */ + if (!has_match) + return -EINVAL; break; + } if (!pe->metric_expr) continue; if (match_metric(pe->metric_group, metric) || match_metric(pe->metric_name, metric)) { - + has_match = true; pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name); if (!strstr(pe->metric_expr, "?")) { ret = __metricgroup__add_metric(events, group_list, pe, 1); + if (ret) + return ret; } else { int j, count; @@ -556,14 +563,15 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events, * those events to group_list. */ - for (j = 0; j < count; j++) + for (j = 0; j < count; j++) { ret = __metricgroup__add_metric(events, group_list, pe, j); + if (ret) + return ret; + } } - if (ret == -ENOMEM) - break; } } - return ret; + return 0; } static int metricgroup__add_metric_list(const char *list, struct strbuf *events, |