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From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: Arnaldo Carvalho de Melo <acme@redhat.com>, Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, yrl.pp-manager.tt@hitachi.com,
	Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@elte.hu>,
	Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
	Steven Rostedt <rostedt@goodmis.org>
Subject: [PATCH 4/4] [BUGFIX] perf probe: Fix to show correct error string
Date: Tue, 04 Oct 2011 19:45:04 +0900
Message-ID: <20111004104504.14591.41266.stgit@fedora15> (raw)
In-Reply-To: <20111004104438.14591.6553.stgit@fedora15>

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: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
---

 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 1c7bfa5..eb25900 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -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;


  parent reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-04 10:44 [PATCH 1/4] [BUGFIX] ftrace/kprobes: Fix not to delete probes if in use Masami Hiramatsu
2011-10-04 10:44 ` [PATCH 2/4] [TRIVIAL] ftrace/kprobes: Fix an warning typo Masami Hiramatsu
2011-10-04 15:58   ` Valdis.Kletnieks
2011-10-05  4:08     ` Masami Hiramatsu
2011-10-04 10:44 ` [PATCH 3/4] [TRIVIAL] perftools: Fix a typo of command name as trace-cmd Masami Hiramatsu
2011-10-04 10:45 ` Masami Hiramatsu [this message]
2011-10-08  5:00 ` [PATCH 1/4] [BUGFIX] ftrace/kprobes: Fix not to delete probes if in use Steven Rostedt
2011-10-10 14:14   ` Masami Hiramatsu
2011-10-10 19:11     ` Steven Rostedt

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