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[23.128.96.37]) by mx.google.com with ESMTPS id x13-20020a17090abc8d00b0026d40e6a819si285924pjr.157.2023.09.12.16.30.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Sep 2023 16:30:16 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id 0495882C92E0; Mon, 11 Sep 2023 23:12:27 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.8 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229461AbjILGMX (ORCPT + 39 others); Tue, 12 Sep 2023 02:12:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50268 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229625AbjILGMV (ORCPT ); Tue, 12 Sep 2023 02:12:21 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E432DE78; Mon, 11 Sep 2023 23:12:17 -0700 (PDT) Received: from kwepemd200002.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4RlCn518WPztQSC; Tue, 12 Sep 2023 14:08:09 +0800 (CST) Received: from huawei.com (10.67.174.28) by kwepemd200002.china.huawei.com (7.221.188.186) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1258.23; Tue, 12 Sep 2023 14:12:14 +0800 From: Liao Chang To: , CC: , Subject: [PATCH] cpufreq: conservative: Ensure requested_freq is greater than min frequency Date: Tue, 12 Sep 2023 06:09:57 +0000 Message-ID: <20230912060957.2516790-1-liaochang1@huawei.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.67.174.28] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemd200002.china.huawei.com (7.221.188.186) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Mon, 11 Sep 2023 23:12:27 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1776876431354058874 X-GMAIL-MSGID: 1776876431354058874 The governor ensures that the requested frequency is greater than the minimum frequency when the condition for decreasing frequency is satisfied. This is done by either reducing the frequency step from the current frequency if the current frequency is greater than the sum of the frequency step and the minimum frequency, or setting the frequency to the minimum one otherwise. Signed-off-by: Liao Chang --- drivers/cpufreq/cpufreq_conservative.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 56500b25d77c..54e09242b2e2 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -130,7 +130,7 @@ static unsigned int cs_dbs_update(struct cpufreq_policy *policy) if (requested_freq == policy->min) goto out; - if (requested_freq > freq_step) + if (requested_freq > policy->min + freq_step) requested_freq -= freq_step; else requested_freq = policy->min;