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: 828555 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 60BCC1D86DE; Fri, 13 Sep 2024 10:39:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.61.82.184 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726223987; cv=none; b=KbzCHomZ54dTSr0caVe5E3G9x7HvdnNsyAdiq83eS+N8sKrcgV6FHp+IlHDHzHRlPyXgikWBAMebz96OytR9xq+otDwIWECRcHMlXDAi3TB5n1xAmrmK23Q9u3dKdZRbu4NWrmbOkS4c1tkf5SWs1cJEIIQCg2WVix4qC1Qjniw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726223987; c=relaxed/simple; bh=X2DjAoiHpajHutur2yyr2h73UAP9b/1c+tj3fIstVGw=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=r/rOyScKFceLKRhKs3uEJu/eu4XKTsP7NiNcepk/gU2meIfJW5M/0uoF+eoiUssjY7BVIDYIP+7kt4TQYvPSfeSGGyoSocDpX9ajAcbUiZcfAFofULycm7CgAHeKndfEAh0YFFCWcqZ2R3gzK2cburQK7Bp+5/OasHmRcG89dP0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=IPg5vfzM; arc=none smtp.client-ip=210.61.82.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="IPg5vfzM" X-UUID: 7a0ef66671bc11ef8b96093e013ec31c-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:cf55a4b8-e325-4ac6-8b7c-a2517bc4388f, 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:c9f0ebbf-d7af-4351-93aa-42531abf0c7b, 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: 7a0ef66671bc11ef8b96093e013ec31c-20240913 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 943353095; Fri, 13 Sep 2024 18:39:38 +0800 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 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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(-)