From patchwork Wed Jul 5 08:59:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chungkai Yang X-Patchwork-Id: 699973 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 BFB2DEB64DA for ; Wed, 5 Jul 2023 08:59:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231290AbjGEI7T (ORCPT ); Wed, 5 Jul 2023 04:59:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231152AbjGEI7S (ORCPT ); Wed, 5 Jul 2023 04:59:18 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2A8510E2; Wed, 5 Jul 2023 01:59:15 -0700 (PDT) X-UUID: 34d824de1b1211ee9cb5633481061a41-20230705 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=vepb8sQgZ1ddPhURr2IJj8dJ6RrdgtEMpT1it/FOgsE=; b=guQAvCmvZTHcNsnjaFWvCYu214Rw+EOYun2WKKp0zGndtRTNPXBGAJVR29I2OSVsKfrNdkscxgO/Kbuwy3yGNLh5fvLMlVw/JHbm/9dTCEwrTqMtXYiLNsQ72NmFnlq3N0ACMgSVkdN7u6nhYv2LvFboYSkB369hubgA/ouWTT8=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.27, REQID:016ed7f0-6679-4371-b73b-b98c374880ab, IP:0, U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:100,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:100 X-CID-INFO: VERSION:1.1.27, REQID:016ed7f0-6679-4371-b73b-b98c374880ab, IP:0, URL :0,TC:0,Content:0,EDM:0,RT:0,SF:100,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTIO N:quarantine,TS:100 X-CID-META: VersionHash:01c9525, CLOUDID:5cc5e20d-c22b-45ab-8a43-3004e9216b56, B ulkID:230705163748ZVIUNA4A,BulkQuantity:1,Recheck:0,SF:19|48|38|29|28|17,T C:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil,Bulk:40,QS:nil,BEC:nil,COL:0, OSI:0,OSA:0,AV:0,LES:1,SPR:NO X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR, TF_CID_SPAM_SDM, TF_CID_SPAM_ASC, TF_CID_SPAM_FAS, TF_CID_SPAM_FSD,TF_CID_SPAM_ULS X-UUID: 34d824de1b1211ee9cb5633481061a41-20230705 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 739156038; Wed, 05 Jul 2023 16:59:10 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.186) by mtkmbs13n1.mediatek.inc (172.21.101.193) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 5 Jul 2023 16:59:09 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 5 Jul 2023 16:59:09 +0800 From: Chungkai Yang To: , , CC: , , , Subject: [PATCH v3] PM: QoS: Restore support for default value on frequency QoS Date: Wed, 5 Jul 2023 16:59:07 +0800 Message-ID: <20230705085907.30880-1-Chung-kai.Yang@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org PM_QOS_DEFAULT_VALUE case is not covered. Commit 8d36694245f2 ("PM: QoS: Add check to make sure CPU freq is non-negative") makes sure CPU freq is non-negative to avoid negative value converting to unsigned data type. However, when the value is PM_QOS_DEFAULT_VALUE, pm_qos_update_target specifically uses c->default_value which is set to FREQ_QOS_MIN/MAX_DEFAULT_VALUE when cpufreq_policy_alloc is executed, for this case handling. Adding check for PM_QOS_DEFAULT_VALUE to let default setting work will fix this problem. Signed-off-by: Chungkai Yang --- V2 -> V3: Added helper function to avoid duplicating the value check. V1 -> V2: Checked both freq_qos_add/update_request. Link: https://lore.kernel.org/lkml/20230626035144.19717-1-Chung-kai.Yang@mediatek.com/ Link: https://lore.kernel.org/lkml/20230627071727.16646-1-Chung-kai.Yang@mediatek.com/ Link: https://lore.kernel.org/lkml/CAJZ5v0gxNOWhC58PHeUhW_tgf6d1fGJVZ1x91zkDdht11yUv-A@mail.gmail.com/ --- kernel/power/qos.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/kernel/power/qos.c b/kernel/power/qos.c index af51ed6d45ef..782d3b41c1f3 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -426,6 +426,11 @@ late_initcall(cpu_latency_qos_init); /* Definitions related to the frequency QoS below. */ +static inline bool freq_qos_value_invalid(s32 value) +{ + return value < 0 && value != PM_QOS_DEFAULT_VALUE; +} + /** * freq_constraints_init - Initialize frequency QoS constraints. * @qos: Frequency QoS constraints to initialize. @@ -531,7 +536,7 @@ int freq_qos_add_request(struct freq_constraints *qos, { int ret; - if (IS_ERR_OR_NULL(qos) || !req || value < 0) + if (IS_ERR_OR_NULL(qos) || !req || freq_qos_value_invalid(value)) return -EINVAL; if (WARN(freq_qos_request_active(req), @@ -563,7 +568,7 @@ EXPORT_SYMBOL_GPL(freq_qos_add_request); */ int freq_qos_update_request(struct freq_qos_request *req, s32 new_value) { - if (!req || new_value < 0) + if (!req || freq_qos_value_invalid(new_value)) return -EINVAL; if (WARN(!freq_qos_request_active(req),