From: Masami Hiramatsu Date: Thu, 14 Aug 2014 02:22:30 +0000 (+0000) Subject: perf probe: Don't use strerror if strlist__add failed X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=6eb08660962a91212902869672dab5199827cbfd;p=openwrt%2Fstaging%2Fblogic.git perf probe: Don't use strerror if strlist__add failed Since the strlist__add doesn't involves any IO, the failure reason must be ENOMEM or EINVAL, moreover this is just a debug message, we don't need to show the error string. And also, if get_probe_trace_command_rawlist() returns NULL, it doesn't mean the rawlist is empty, there is an error. So caller must use -ENOMEM for the error. Signed-off-by: Masami Hiramatsu Cc: Ingo Molnar Cc: Namhyung Kim Cc: Naohiro Aota Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20140814022230.3545.99254.stgit@kbuild-fedora.novalocal Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index ac15ff780009..bf39c23b275d 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1881,7 +1881,7 @@ static struct strlist *get_probe_trace_command_rawlist(int fd) p[idx] = '\0'; ret = strlist__add(sl, buf); if (ret < 0) { - pr_debug("strlist__add failed: %s\n", strerror(-ret)); + pr_debug("strlist__add failed (%d)\n", ret); strlist__delete(sl); return NULL; } @@ -1940,7 +1940,7 @@ static int __show_perf_probe_events(int fd, bool is_kprobe) rawlist = get_probe_trace_command_rawlist(fd); if (!rawlist) - return -ENOENT; + return -ENOMEM; strlist__for_each(ent, rawlist) { ret = parse_probe_trace_command(ent->s, &tev); @@ -2007,6 +2007,8 @@ static struct strlist *get_probe_trace_event_names(int fd, bool include_group) memset(&tev, 0, sizeof(tev)); rawlist = get_probe_trace_command_rawlist(fd); + if (!rawlist) + return NULL; sl = strlist__new(true, NULL); strlist__for_each(ent, rawlist) { ret = parse_probe_trace_command(ent->s, &tev);