From: Namhyung Kim <namhy...@kernel.org> 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 <namhy...@kernel.org> Acked-by: Masami Hiramatsu <masami.hiramatsu...@hitachi.com> Cc: David Ahern <dsah...@gmail.com> Cc: Ingo Molnar <mi...@kernel.org> Cc: Jiri Olsa <jo...@redhat.com> Cc: Masami Hiramatsu <masami.hiramatsu...@hitachi.com> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Link: http://lkml.kernel.org/r/1420886028-15135-4-git-send-email-namhy...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/probe-event.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
