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| author |   Namhyung Kim <namhyung@kernel.org> | 2015-01-10 19:33:48 +0900 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-01-16 17:49:28 -0300 |
| commit | 7949ba1fa249caa7e611abb8d92f40b0a46c8617 (patch) | |
| tree | 51b3a6b4ff09b3b45c318174d69ef15ae5c5614b /tools/perf/util | |
| parent | perf/x86/intel: Fix bug for "cycles:p" and "cycles:pp" on SLM (diff) | |
| download | linux-dev-7949ba1fa249caa7e611abb8d92f40b0a46c8617.tar.xz linux-dev-7949ba1fa249caa7e611abb8d92f40b0a46c8617.zip | |
perf probe: Propagate error code when write(2) failed
When it failed to write probe commands to the probe_event file in
debugfs, it needs to propagate the error code properly. Current code
blindly uses the return value of the write(2) so it always uses
-1 (-EPERM) and it might confuse users.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1420886028-15135-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/probe-event.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 7f9b8632e433..94a717bf007d 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -2052,9 +2052,11 @@ static int write_probe_trace_event(int fd, struct probe_trace_event *tev) pr_debug("Writing event: %s\n", buf); if (!probe_event_dry_run) { ret = write(fd, buf, strlen(buf)); - if (ret <= 0) + if (ret <= 0) { + ret = -errno; pr_warning("Failed to write event: %s\n", strerror_r(errno, sbuf, sizeof(sbuf))); + } } free(buf); return ret; |