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perf probe: Fix to show correct error string

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Fix perf probe to show correct error string when it
fails to delete an event. The write(2) returns -1
if failed, and errno stores real error number.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/20111004104504.14591.41266.stgit@fedora15
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2011-10-04 19:45:04 +09:00 committed by Steven Rostedt
parent 02ca1521ad
commit 44a56040a0
1 changed files with 3 additions and 1 deletions
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4
tools/perf/util/probe-event.c
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@ -1956,8 +1956,10 @@ static int __del_trace_probe_event(int fd, struct str_node *ent)
pr_debug("Writing event: %s\n", buf);
ret = write(fd, buf, strlen(buf));
if (ret < 0)
if (ret < 0) {
ret = -errno;
goto error;
}
printf("Remove event: %s\n", ent->s);
return 0;