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 5D586C0044C for ; Sun, 11 Nov 2018 23:46:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C74420818 for ; Sun, 11 Nov 2018 23:46:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Nj2jVj/x" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1C74420818 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 S2387576AbeKLJgq (ORCPT ); Mon, 12 Nov 2018 04:36:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:39684 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730330AbeKLITB (ORCPT ); Mon, 12 Nov 2018 03:19:01 -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 0E670208A3; Sun, 11 Nov 2018 22:29:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541975345; bh=FU6rwPi4QsYhX3tal/NH5BXn1uyR2hn3xZ2FyPqtRgs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Nj2jVj/x5g7jOiIKqHiubHKClQ1gCQfXOnkaDGIRExKWhmJOgcYkjK5Sn4x4oHgrd ynTbzfhT84CgroCKd76GPGVvatWa0RbQkUtgvdgfhGDpzoxCjaTGog7R9BB2l25t07 oFvJvFTFzqJ69qoN8ciCO8LLt1C3eIs0+cnDj0q0= 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 4.19 325/361] tracing: Return -ENOENT if there is no target synthetic event Date: Sun, 11 Nov 2018 14:21:12 -0800 Message-Id: <20181111221659.409469592@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181111221619.915519183@linuxfoundation.org> References: <20181111221619.915519183@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 4.19-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 @@ -1063,8 +1063,10 @@ 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;