From patchwork Fri Sep 13 10:39:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Tseng X-Patchwork-Id: 13803267 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7AF3FFA3741 for ; Fri, 13 Sep 2024 10:40:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=L/SYtEbl/61399Qh+bHxFsGQAy9IhdUiQzlwegY6SMo=; b=n0OrHfsFcfhRMIaZi0EPgx50bf sDdD/otNWdwLv6eBuSF+sGSkGvmBjnPLDCwgzEme2lj3FvP+Kc5br6hIyvWZCYAm8twzs1RMM9U1o BDbOy1HB3ElvA332jCMLa9gLWoYXFo3FqIE6DcoBg1CrFhpsqz2dVFTGOOBtDXI2XOrb2QXt/hZwP hxCCLbyk1gxQ5XB4pct/x5f3Cz1Vk1e36hUhLWJDS8nMWNyVpP81HSUosZyFSDULvWA5EDKCmcYqA 2AKwgLUJi+G4g4YehTRz4M4pXN2WNGh8k35dx84gO7P60dROLX8eIVnTqbUPYWrgoHaDKajFtkoJu zqd+Os2g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sp3jR-0000000Fea2-0MWy; Fri, 13 Sep 2024 10:40:53 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sp3ir-0000000FeRa-2epx; Fri, 13 Sep 2024 10:40:18 +0000 X-UUID: 8e6d013e71bc11efba0aef63c0775dbf-20240913 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=L/SYtEbl/61399Qh+bHxFsGQAy9IhdUiQzlwegY6SMo=; b=IPg5vfzMD5NUoaQMvGTgr+d9pIMoZnhd0N3aaLyAG0dYMWe1x5ZoP/zn3+oXqsm16SdqxhC4LFeDZfybUvK7jnNDH0NxBFgNT2NpqEkFr8Z0+LSmvI05/wGF246GVAh33zNzRB+Whu8QxsGG/NGgftLhIoKRBojqkRTaos2nPp8=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.41,REQID:04162fef-7de9-48b2-a2cd-5215fe7b7207,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:6dc6a47,CLOUDID:3d7a2ad0-7921-4900-88a1-3aef019a55ce,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1, SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 8e6d013e71bc11efba0aef63c0775dbf-20240913 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1211637803; Fri, 13 Sep 2024 03:40:12 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS09N2.mediatek.inc (172.21.101.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 13 Sep 2024 03:39:37 -0700 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; Fri, 13 Sep 2024 18:39:37 +0800 From: Mark Tseng To: "Rafael J . Wysocki" , Viresh Kumar , MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , Subject: [PATCH v1 0/2] fixed mediatek-cpufreq has multi policy concurrency issue Date: Fri, 13 Sep 2024 18:39:31 +0800 Message-ID: <20240913103933.30895-1-chun-jen.tseng@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240913_034017_728587_02A8144C X-CRM114-Status: UNSURE ( 7.26 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org For multi cluster SoC, the cpufreq->target_index() is re-enter function for each policy to change CPU frequency. In the cirtical session must use glocal mutex lock to avoid get wrong OPP. Mark Tseng (2): PM / devfreq: mediatek: protect oop in critical session cpufreq: mediatek: Fixed cpufreq has 2 policy will cause concurrency drivers/cpufreq/mediatek-cpufreq.c | 65 ++++++++++++++++++++++-------- drivers/devfreq/mtk-cci-devfreq.c | 30 +++++++------- 2 files changed, 64 insertions(+), 31 deletions(-)