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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD309C3526D for ; Tue, 25 Jan 2022 00:05:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2369190AbiAYABL (ORCPT ); Mon, 24 Jan 2022 19:01:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1847031AbiAXXSV (ORCPT ); Mon, 24 Jan 2022 18:18:21 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 40BAEC06F8D6; Mon, 24 Jan 2022 13:26:31 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id D9215B81243; Mon, 24 Jan 2022 21:26:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3513CC340E4; Mon, 24 Jan 2022 21:26:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643059589; bh=N5cFYl5qlbcsInQjVrE7IG8gddEZ3I2S9BMXo0GCtUU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BzEp380x6h16gR8g8EOhKZv+NWfjAHNeDq1I0pAqYh+09nKOHVy3He2ojtly21bAW hbL5fy+rXRMRb4EEJI8s7PBIY2E+5Znc5Rpo8GMiuQcDR/0e/NEFQ8j++IcPUkRWmh YZrqcbt4rXhcDhQHF9Zb1oM2dqndvCMZIS57dRRs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Srinivas Pandruvada , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 5.16 0667/1039] cpufreq: Fix initialization of min and max frequency QoS requests Date: Mon, 24 Jan 2022 19:40:56 +0100 Message-Id: <20220124184147.797717994@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184125.121143506@linuxfoundation.org> References: <20220124184125.121143506@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: stable@vger.kernel.org From: Rafael J. Wysocki [ Upstream commit 521223d8b3ec078f670c7c35a1a04b1b2af07966 ] The min and max frequency QoS requests in the cpufreq core are initialized to whatever the current min and max frequency values are at the init time, but if any of these values change later (for example, cpuinfo.max_freq is updated by the driver), these initial request values will be limiting the CPU frequency unnecessarily unless they are changed by user space via sysfs. To address this, initialize min_freq_req and max_freq_req to FREQ_QOS_MIN_DEFAULT_VALUE and FREQ_QOS_MAX_DEFAULT_VALUE, respectively, so they don't really limit anything until user space updates them. Reported-by: Srinivas Pandruvada Tested-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/cpufreq/cpufreq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 096c3848fa415..76ffdaf8c8b5e 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1403,7 +1403,7 @@ static int cpufreq_online(unsigned int cpu) ret = freq_qos_add_request(&policy->constraints, policy->min_freq_req, FREQ_QOS_MIN, - policy->min); + FREQ_QOS_MIN_DEFAULT_VALUE); if (ret < 0) { /* * So we don't call freq_qos_remove_request() for an @@ -1423,7 +1423,7 @@ static int cpufreq_online(unsigned int cpu) ret = freq_qos_add_request(&policy->constraints, policy->max_freq_req, FREQ_QOS_MAX, - policy->max); + FREQ_QOS_MAX_DEFAULT_VALUE); if (ret < 0) { policy->max_freq_req = NULL; goto out_destroy_policy; -- 2.34.1