From nobody Tue Feb 10 04:23:16 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3139AEB64D7 for ; Wed, 28 Jun 2023 14:05:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231464AbjF1OFP (ORCPT ); Wed, 28 Jun 2023 10:05:15 -0400 Received: from dfw.source.kernel.org ([139.178.84.217]:39632 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232414AbjF1ODl (ORCPT ); Wed, 28 Jun 2023 10:03:41 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7E48661342 for ; Wed, 28 Jun 2023 14:03:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA91BC433C0; Wed, 28 Jun 2023 14:03:39 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.96) (envelope-from ) id 1qEVli-002phL-2s; Wed, 28 Jun 2023 10:03:38 -0400 Message-ID: <20230628140338.707970985@goodmis.org> User-Agent: quilt/0.66 Date: Wed, 28 Jun 2023 08:54:49 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Andrew Morton , Beau Belgrave , sunliming Subject: [for-linus][PATCH 1/3] tracing/user_events: Fix incorrect return value for writing operation when events are disabled References: <20230628125448.007243475@goodmis.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: sunliming The writing operation return the count of writes regardless of whether even= ts are enabled or disabled. Switch it to return -EBADF to indicates that the e= vent is disabled. Link: https://lkml.kernel.org/r/20230626111344.19136-2-sunliming@kylinos.cn Acked-by: Beau Belgrave Signed-off-by: sunliming Signed-off-by: Steven Rostedt (Google) --- kernel/trace/trace_events_user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_u= ser.c index 8df0550415e7..09f7d9167b8e 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -2096,7 +2096,8 @@ static ssize_t user_events_write_core(struct file *fi= le, struct iov_iter *i) =20 if (unlikely(faulted)) return -EFAULT; - } + } else + return -EBADF; =20 return ret; } --=20 2.39.2