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authorNamhyung Kim <namhyung@kernel.org>2015-01-10 13:33:48 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-01-16 23:49:28 +0300
commit7949ba1fa249caa7e611abb8d92f40b0a46c8617 (patch)
tree51b3a6b4ff09b3b45c318174d69ef15ae5c5614b
parent33636732dcd7cc738a5913bb730d663c6b03c8fb (diff)
downloadlinux-7949ba1fa249caa7e611abb8d92f40b0a46c8617.tar.xz
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>
-rw-r--r--tools/perf/util/probe-event.c4
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;