Commit 7949ba1f authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo

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: default avatarNamhyung Kim <namhyung@kernel.org>
Acked-by: default avatarMasami 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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 33636732
...@@ -2052,10 +2052,12 @@ static int write_probe_trace_event(int fd, struct probe_trace_event *tev) ...@@ -2052,10 +2052,12 @@ static int write_probe_trace_event(int fd, struct probe_trace_event *tev)
pr_debug("Writing event: %s\n", buf); pr_debug("Writing event: %s\n", buf);
if (!probe_event_dry_run) { if (!probe_event_dry_run) {
ret = write(fd, buf, strlen(buf)); ret = write(fd, buf, strlen(buf));
if (ret <= 0) if (ret <= 0) {
ret = -errno;
pr_warning("Failed to write event: %s\n", pr_warning("Failed to write event: %s\n",
strerror_r(errno, sbuf, sizeof(sbuf))); strerror_r(errno, sbuf, sizeof(sbuf)));
} }
}
free(buf); free(buf);
return ret; return ret;
} }
......
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