From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4A40C43441 for ; Sun, 11 Nov 2018 22:32:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8EC31223C6 for ; Sun, 11 Nov 2018 22:32:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="j3N88ora" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8EC31223C6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390147AbeKLIV5 (ORCPT ); Mon, 12 Nov 2018 03:21:57 -0500 Received: from mail.kernel.org ([198.145.29.99]:50044 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388732AbeKLIVx (ORCPT ); Mon, 12 Nov 2018 03:21:53 -0500 Received: from localhost (unknown [206.108.79.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id ED2372243B; Sun, 11 Nov 2018 22:31:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541975516; bh=kMtSP4OZI565RyD5PA5YsS90QxIZGwAzfR/wgwgsjd0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j3N88oraIpIR90//tJQKd+DuewGxPmRmlRcKM6g9ttPDIc8U3ttyodFAW/YZ0EoSy E7f4NWqiI0yp2xQx7UgYEUDp6yBfbMEo50xMz4RDqcdkVrKVKD0oB5smguzE7VnTiS UJbreZxv6606QoS0tTE/O/DWk4zrgmI4gSsmxcDM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tom Zanussi , Shuah Khan , Rajvi Jingar , Masami Hiramatsu , "Steven Rostedt (VMware)" Subject: [PATCH 4.18 316/350] tracing: Return -ENOENT if there is no target synthetic event Date: Sun, 11 Nov 2018 14:23:00 -0800 Message-Id: <20181111221721.284161758@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181111221707.043394111@linuxfoundation.org> References: <20181111221707.043394111@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Masami Hiramatsu commit 18858511fd8a877303cc34c06efa461b26a0e070 upstream. Return -ENOENT error if there is no target synthetic event. This notices an operation failure to user as below; # echo 'wakeup_latency u64 lat; pid_t pid;' > synthetic_events # echo '!wakeup' >> synthetic_events sh: write error: No such file or directory Link: http://lkml.kernel.org/r/154013449986.25576.9487131386597290172.stgit@devbox Acked-by: Tom Zanussi Tested-by: Tom Zanussi Cc: Shuah Khan Cc: Rajvi Jingar Cc: stable@vger.kernel.org Fixes: 4b147936fa50 ('tracing: Add support for 'synthetic' events') Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman --- kernel/trace/trace_events_hist.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -1072,8 +1072,10 @@ static int create_synth_event(int argc, event = NULL; ret = -EEXIST; goto out; - } else if (delete_event) + } else if (delete_event) { + ret = -ENOENT; goto out; + } if (argc < 2) { ret = -EINVAL;