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=-18.8 required=3.0 tests=BAYES_00,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=unavailable 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 1D37EC4332B for ; Mon, 4 Jan 2021 16:00:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C90142250E for ; Mon, 4 Jan 2021 16:00:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728184AbhADQAC (ORCPT ); Mon, 4 Jan 2021 11:00:02 -0500 Received: from mail.kernel.org ([198.145.29.99]:36560 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728164AbhADQAB (ORCPT ); Mon, 4 Jan 2021 11:00:01 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7309322507; Mon, 4 Jan 2021 15:59:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609775974; bh=wnUQKLxohvRGyTmXR07pj6xB9AmiF50wiB7wPUNxG6A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JsXpqkeck7BGTAX1dXbGS0vcthLAs227xdVf/Lh3XGM0X434vpmlKyL4+V8hho0vr EE2ILUJ0FIsiWgFnV3bEQ3JcD+dAaKBmLhBrykMB+wHCqDUd3zVsN2EUnsgUhZ4ZWn J/k/6QOl+2AYuvLF2yhUK1BMxsu+jAB78RTrOTJk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhuguangqing , Viresh Kumar , Daniel Lezcano Subject: [PATCH 5.4 03/47] thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed Date: Mon, 4 Jan 2021 16:57:02 +0100 Message-Id: <20210104155705.912483575@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210104155705.740576914@linuxfoundation.org> References: <20210104155705.740576914@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zhuguangqing commit 236761f19a4f373354f1dcf399b57753f1f4b871 upstream. If state has not changed successfully and we updated cpufreq_state, next time when the new state is equal to cpufreq_state (not changed successfully last time), we will return directly and miss a freq_qos_update_request() that should have been. Fixes: 5130802ddbb1 ("thermal: cpu_cooling: Switch to QoS requests for freq limits") Cc: v5.4+ # v5.4+ Signed-off-by: Zhuguangqing Acked-by: Viresh Kumar Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20201106092243.15574-1-zhuguangqing83@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/thermal/cpu_cooling.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- a/drivers/thermal/cpu_cooling.c +++ b/drivers/thermal/cpu_cooling.c @@ -320,6 +320,7 @@ static int cpufreq_set_cur_state(struct unsigned long state) { struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata; + int ret; /* Request state should be less than max_level */ if (WARN_ON(state > cpufreq_cdev->max_level)) @@ -329,10 +330,12 @@ static int cpufreq_set_cur_state(struct if (cpufreq_cdev->cpufreq_state == state) return 0; - cpufreq_cdev->cpufreq_state = state; + ret = freq_qos_update_request(&cpufreq_cdev->qos_req, + cpufreq_cdev->freq_table[state].frequency); + if (ret > 0) + cpufreq_cdev->cpufreq_state = state; - return freq_qos_update_request(&cpufreq_cdev->qos_req, - cpufreq_cdev->freq_table[state].frequency); + return ret; } /**