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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 145F5C433DB for ; Mon, 11 Jan 2021 17:12:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE6C722B30 for ; Mon, 11 Jan 2021 17:12:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389299AbhAKRMU (ORCPT ); Mon, 11 Jan 2021 12:12:20 -0500 Received: from foss.arm.com ([217.140.110.172]:33204 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730342AbhAKRMT (ORCPT ); Mon, 11 Jan 2021 12:12:19 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 12D8F11B3; Mon, 11 Jan 2021 09:11:34 -0800 (PST) Received: from e120877-lin.cambridge.arm.com (e120877-lin.cambridge.arm.com [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3DC3E3F70D; Mon, 11 Jan 2021 09:11:33 -0800 (PST) From: vincent.donnefort@arm.com To: peterz@infradead.org, tglx@linutronix.de, linux-kernel@vger.kernel.org Cc: valentin.schneider@arm.com, Vincent Donnefort Subject: [PATCH 1/4] cpu/hotplug: Allowing to reset fail injection Date: Mon, 11 Jan 2021 17:10:44 +0000 Message-Id: <1610385047-92151-2-git-send-email-vincent.donnefort@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1610385047-92151-1-git-send-email-vincent.donnefort@arm.com> References: <1610385047-92151-1-git-send-email-vincent.donnefort@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vincent Donnefort Currently, the only way of resetting this file is to actually try to run a hotplug, hotunplug or both. This is quite annoying for testing and, as the default value for this file is -1, it seems quite natural to let a user write it. Signed-off-by: Vincent Donnefort --- kernel/cpu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/cpu.c b/kernel/cpu.c index 1b6302e..9121edf 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -2207,6 +2207,11 @@ static ssize_t write_cpuhp_fail(struct device *dev, if (ret) return ret; + if (fail == CPUHP_INVALID) { + st->fail = fail; + return count; + } + if (fail < CPUHP_OFFLINE || fail > CPUHP_ONLINE) return -EINVAL; -- 2.7.4