From patchwork Mon Jul 12 06:07:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 475773 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 A28DAC11F69 for ; Mon, 12 Jul 2021 07:10:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B312613D6 for ; Mon, 12 Jul 2021 07:10:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241013AbhGLHNp (ORCPT ); Mon, 12 Jul 2021 03:13:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:45838 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245337AbhGLHLj (ORCPT ); Mon, 12 Jul 2021 03:11:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DD61D6052B; Mon, 12 Jul 2021 07:08:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626073730; bh=3AiVv/LfwI91vjTakuEn/rOtlxcUxuqn2PImj3a9zB8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=necXCugzKcBblZwbus6wNWAxnrLqqhFI1nxrYN+d8H2+SYvaPRC/x53/w5k726jo2 c9Cp1q3yicvFI/S2y/pX7wSXHXqh6G9FmgmQWzMpNpkdztQyx5I8kA9/kcD0dgTxIu czxw7kwPjIWICb8CzLmIvC7mhTgyvMSCDJ88pi/c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Rafael J. Wysocki" , Viresh Kumar , Sasha Levin Subject: [PATCH 5.12 339/700] cpufreq: Make cpufreq_online() call driver->offline() on errors Date: Mon, 12 Jul 2021 08:07:02 +0200 Message-Id: <20210712061012.378170982@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060924.797321836@linuxfoundation.org> References: <20210712060924.797321836@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Rafael J. Wysocki [ Upstream commit 3b7180573c250eb6e2a7eec54ae91f27472332ea ] In the CPU removal path the ->offline() callback provided by the driver is always invoked before ->exit(), but in the cpufreq_online() error path it is not, so ->exit() is expected to somehow know the context in which it has been called and act accordingly. That is less than straightforward, so make cpufreq_online() invoke the driver's ->offline() callback, if present, on errors before ->exit() too. This only potentially affects intel_pstate. Fixes: 91a12e91dc39 ("cpufreq: Allow light-weight tear down and bring up of CPUs") Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar Signed-off-by: Sasha Levin --- drivers/cpufreq/cpufreq.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 1d1b563cea4b..1bc1293deae9 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1370,9 +1370,14 @@ static int cpufreq_online(unsigned int cpu) goto out_free_policy; } + /* + * The initialization has succeeded and the policy is online. + * If there is a problem with its frequency table, take it + * offline and drop it. + */ ret = cpufreq_table_validate_and_sort(policy); if (ret) - goto out_exit_policy; + goto out_offline_policy; /* related_cpus should at least include policy->cpus. */ cpumask_copy(policy->related_cpus, policy->cpus); @@ -1518,6 +1523,10 @@ out_destroy_policy: up_write(&policy->rwsem); +out_offline_policy: + if (cpufreq_driver->offline) + cpufreq_driver->offline(policy); + out_exit_policy: if (cpufreq_driver->exit) cpufreq_driver->exit(policy);