From patchwork Mon Mar 6 07:56:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 64509 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp1724115wrd; Mon, 6 Mar 2023 00:34:31 -0800 (PST) X-Google-Smtp-Source: AK7set/rcruwfk2nXR/1ZhQLHYfinHVvTTPvDwfKDTUy9QPBDGS9K2YQCleAPWnWBedRDrGxsSxC X-Received: by 2002:a17:907:a429:b0:88b:23bb:e61f with SMTP id sg41-20020a170907a42900b0088b23bbe61fmr12888299ejc.25.1678091671571; Mon, 06 Mar 2023 00:34:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678091671; cv=none; d=google.com; s=arc-20160816; b=XT92szCW+6OUsYYAFchkmJxDXGVslCPa830br74kkbjTnI1a79DV9EYJvXXgYaQx7m 9B60SXm58kosMBsja9SwfI598S6FsSijoz2aUbEGosbQX6PV6b8wV47VwfjOmU+WDeon b0Q5y+YfzawMHDJwXSWDiOYCNTsQBc9bUC5P3hUoovAFU7wjdhjLr1ZhKoPsQLR3siPE iw6xZmSddu+iQoCmx5TNDzFx2+etuShal1heoLlIWMtn63RnFK0iA93d5KFx5F2t75n/ wWOnwXJjd130kkyNpxJI1hBAEWM8AV0M4cQgcLtt1D1YGOHyGdCDgM6i0plLni9SMR3u g0EQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=ogGnaAILIvlRo9xVDt7UqeerAvT5EjhmjbGf9s0Aukc=; b=ZU3240xVui/ZoMI3Kcb2ElSpOzfZnlqCNECtMurV/F89AtybrWA/F5GhT16jmegVsf id8wj1zpkKnSRNfxYhtZr7hJAM+Bt7e8a/Y+wDWMz3MJ0RpaK4WwteSJl7+INUvsuU/H 6vtG1T3PelTPMgdBYsn7Hw/7KzUFz9pN9AD+2oAzVov7AsyivMbbO3YKOKb5s72CLFtM 8bl95DfZzKm4dsjqSDxNsSh+A4ZZwzI8AytaNRx3bc3P7GpX7ivoMEoiM8bL1KUv4R+P BKizzdL/yW5Jpntw8GmNth0qCXAW21LPDZj2j3WANVLcQp4zDZHZbsHlBe/EEu7RZOkY PWmQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=aDFMXr2a; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id hr23-20020a1709073f9700b008d6d20d1920si8605452ejc.35.2023.03.06.00.34.08; Mon, 06 Mar 2023 00:34:31 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=aDFMXr2a; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229835AbjCFH5n (ORCPT + 99 others); Mon, 6 Mar 2023 02:57:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229510AbjCFH5i (ORCPT ); Mon, 6 Mar 2023 02:57:38 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 739B11A66C; Sun, 5 Mar 2023 23:57:37 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 0D5C860C19; Mon, 6 Mar 2023 07:57:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A4DCC4339E; Mon, 6 Mar 2023 07:57:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1678089456; bh=JjFBIGNgV2Cm1u5desSZVRT/U8G7kiyoRq57rcmsdmY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aDFMXr2aEteMoz/msUfeCJ0AK/oMVg9N/wQrLdJejt+q4evhI8CW4/NVsSL6MYKtS ePdV1A3LMyX4D6kMU4LoJ8n/ZKfI2PE1Z//i6cMF9J8OPONI0EKqaeQc3Rb9AN51v5 I9cCE5oC6UnFtFUAmFddZ/frHXRNDErjq/AOGnx14eFp8hb2gYFrpOm9RSmflmza4T W2SobPLSTb2WeXZPIUFW6PSDM3U6oXz+JxvcjpSJ9qFqVEJ89eXt/oqMKgLn6nPRUB XhlWIvSefubbZp/KDCLR1UXba8bF74qLV6YVDYKUfG2tjLdAvpCd0LuMzsw9PSKOJH AULf9yOkaOO0Q== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1pZ5jc-0000i1-4f; Mon, 06 Mar 2023 08:58:16 +0100 From: Johan Hovold To: Georgi Djakov Cc: "Shawn Guo" , "Sascha Hauer" , "Pengutronix Kernel Team" , "Fabio Estevam" , "NXP Linux Team" , "Andy Gross" , "Bjorn Andersson" , "Konrad Dybcio" , "Sylwester Nawrocki" , =?utf-8?b?QXJ0dXIgxZp3aWdv?= =?utf-8?b?xYQ=?= , "Krzysztof Kozlowski" , "Alim Akhtar" , "Thierry Reding" , "Jonathan Hunter" , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable@vger.kernel.org Subject: [PATCH v2 05/23] interconnect: qcom: osm-l3: fix registration race Date: Mon, 6 Mar 2023 08:56:33 +0100 Message-Id: <20230306075651.2449-6-johan+linaro@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230306075651.2449-1-johan+linaro@kernel.org> References: <20230306075651.2449-1-johan+linaro@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759606653063705372?= X-GMAIL-MSGID: =?utf-8?q?1759606653063705372?= The current interconnect provider registration interface is inherently racy as nodes are not added until the after adding the provider. This can specifically cause racing DT lookups to fail: of_icc_xlate_onecell: invalid index 0 cpu cpu0: error -EINVAL: error finding src node cpu cpu0: dev_pm_opp_of_find_icc_paths: Unable to get path0: -22 qcom-cpufreq-hw: probe of 18591000.cpufreq failed with error -22 Switch to using the new API where the provider is not registered until after it has been fully initialised. Fixes: 5bc9900addaf ("interconnect: qcom: Add OSM L3 interconnect provider support") Cc: stable@vger.kernel.org # 5.7 Reviewed-by: Konrad Dybcio Signed-off-by: Johan Hovold --- drivers/interconnect/qcom/osm-l3.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c index 5fa171087425..3a1cbfe3e481 100644 --- a/drivers/interconnect/qcom/osm-l3.c +++ b/drivers/interconnect/qcom/osm-l3.c @@ -158,8 +158,8 @@ static int qcom_osm_l3_remove(struct platform_device *pdev) { struct qcom_osm_l3_icc_provider *qp = platform_get_drvdata(pdev); + icc_provider_deregister(&qp->provider); icc_nodes_remove(&qp->provider); - icc_provider_del(&qp->provider); return 0; } @@ -245,14 +245,9 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) provider->set = qcom_osm_l3_set; provider->aggregate = icc_std_aggregate; provider->xlate = of_icc_xlate_onecell; - INIT_LIST_HEAD(&provider->nodes); provider->data = data; - ret = icc_provider_add(provider); - if (ret) { - dev_err(&pdev->dev, "error adding interconnect provider\n"); - return ret; - } + icc_provider_init(provider); for (i = 0; i < num_nodes; i++) { size_t j; @@ -275,12 +270,15 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) } data->num_nodes = num_nodes; + ret = icc_provider_register(provider); + if (ret) + goto err; + platform_set_drvdata(pdev, qp); return 0; err: icc_nodes_remove(provider); - icc_provider_del(provider); return ret; }