From patchwork Mon Jul 4 11:27:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Gondois X-Patchwork-Id: 12905136 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 0C4C8CCA479 for ; Mon, 4 Jul 2022 11:28:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233194AbiGDL2j (ORCPT ); Mon, 4 Jul 2022 07:28:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233910AbiGDL2e (ORCPT ); Mon, 4 Jul 2022 07:28:34 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0668910FE0; Mon, 4 Jul 2022 04:28:33 -0700 (PDT) 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 1FE9723A; Mon, 4 Jul 2022 04:28:33 -0700 (PDT) Received: from pierre123.arm.com (unknown [10.57.41.108]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 5BE353F66F; Mon, 4 Jul 2022 04:28:30 -0700 (PDT) From: Pierre Gondois To: linux-kernel@vger.kernel.org Cc: Ionela.Voinescu@arm.com, Dietmar.Eggemann@arm.com, Pierre Gondois , "Rafael J. Wysocki" , Viresh Kumar , Andy Gross , Bjorn Andersson , linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v2 2/4] cpufreq: qcom-hw: Disable LMH irq when disabling policy Date: Mon, 4 Jul 2022 13:27:37 +0200 Message-Id: <20220704112739.3020516-3-pierre.gondois@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220704112739.3020516-1-pierre.gondois@arm.com> References: <20220704112739.3020516-1-pierre.gondois@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org If LMH (Limits Management Hardware) is available, when a policy is disabled by unplugging the last online CPU of policy->cpus, the LMH irq is left enabled. When the policy is re-enabled with any of the CPU in policy->cpus being plugged in, qcom_cpufreq_ready() re-enables the irq. This triggers the following warning: [ 379.160106] Unbalanced enable for IRQ 154 [ 379.160120] WARNING: CPU: 7 PID: 48 at kernel/irq/manage.c:774 __enable_irq+0x84/0xc0 Thus disable the irq. Signed-off-by: Pierre Gondois --- drivers/cpufreq/qcom-cpufreq-hw.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 8e5eeb982ebd..729346a62a17 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -470,6 +470,7 @@ static int qcom_cpufreq_hw_cpu_offline(struct cpufreq_policy *policy) cancel_delayed_work_sync(&data->throttle_work); irq_set_affinity_hint(data->throttle_irq, NULL); + disable_irq_nosync(data->throttle_irq); return 0; }