From patchwork Mon Mar 6 07:56:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 64488 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp1712644wrd; Sun, 5 Mar 2023 23:58:52 -0800 (PST) X-Google-Smtp-Source: AK7set99rOAP0gED8SDnSWSUow723q2IF5TAsGsOUVf6cHZbZYJen2C9WZQIX2QIFtUbPDP8yrHL X-Received: by 2002:a05:6a20:2a1e:b0:bf:c0e8:fbc9 with SMTP id e30-20020a056a202a1e00b000bfc0e8fbc9mr9267006pzh.32.1678089532455; Sun, 05 Mar 2023 23:58:52 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678089532; cv=none; d=google.com; s=arc-20160816; b=mjrlPLztVn1lmdtGotDW+oIQP7FFNtKMYxmMlhjFhqPR0u2KFRe2s1/6SlDcVI9lyR jheYfBc5yEJciK4fGhM/52E8aWEFxVtGfWkH15aIyqgMdDIvk9AeIQ8H5E69mnqIvFIi HkqM9IUJQ6XS6PsKVRDRvI5IC3XifPNJ38g/w0ykS3NS94gmRxFOqF6mcVjNmf+ioWDq unxOaFuPaELtLVgY5+o8+/ITRVI2foFCoLI7CJGI/QKL0wbMAo/JmV9nzVdMQrdG2N1v vMwbl10TH0C57KEvOCNstN2+ykMVDBjcyFqJx2TOkM37iZKwDWzmLtvAurUeYYlFFO2y INDA== 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=DwzUefjq1dVGEGczUxXdSXi+7moqF+T5YQAP7WwVacQ=; b=SuzFCcXgdq5JAc/IupD4Gb91Wne/m9SOZllwa1XGO2+h/4f+f1MxJcTx7s/GHCq/9l 88QMWfwLTh6ZZcHEp6XcEr6mA1uYgUOg64OCTfhpnwSWkf93G3Ud+q0ceOKcJzPHcOdJ m2FR2jrllvJuf42nA7xAauotzv35nPGLQ2l9LsdeVVkBMJEXR401KCyTSwj/Nb1g821V g1JaQpydDArUqLn3nxcftHUi2+QB1MsIqhcsi3zb3FDsgyqVascOn7UzwcVnl06gy4sU xWx/dWKk9YJSNh9owJqvo3FOuDDe/z1xLf+a+GTs7zOxLAfb9IlkLFGaULQKJd7Vj2mY /1SQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=Cx51lNLw; 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 o8-20020a63e348000000b004ffc2ec1b51si8325738pgj.271.2023.03.05.23.58.40; Sun, 05 Mar 2023 23:58:52 -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=Cx51lNLw; 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 S229986AbjCFH6H (ORCPT + 99 others); Mon, 6 Mar 2023 02:58:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229805AbjCFH5l (ORCPT ); Mon, 6 Mar 2023 02:57:41 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 355581F5E0; Sun, 5 Mar 2023 23:57:39 -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 ams.source.kernel.org (Postfix) with ESMTPS id DA9DAB80CAD; Mon, 6 Mar 2023 07:57:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4CB27C433A1; 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=Rngp6Jy2nDUmPtMi90PgWznpQX+Xr7VYE/JPsZohmAc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Cx51lNLwe6cHUaYqpx5KRqo8r7aJIyzTVmjprkzWV091z4qB3PA/cHn9W5KN3hwEe MFHpRke2YKcZ0M+Sm962LzpvvrEWXRWVlehO0UDpQYu7FfvO/pMEUhelJi0+8DZt5F BObl8q56NFY67/Zz4zzutuE+/ITVYM+/Jwte5/jdh2MpYZKDEuFGdDsDwLjls2tM/q khukH3i4pTyvf2nFi7LndFFf6yRFwAr/TlT7Yi1dOdBKeh3j5tN/zz/Ty9OwdLsYLZ mQZH9cSRWYTA5w6KpSWqWI5mv/96LliWxajFzQXpUs2sxXvS8Mij0EyDzjKhWY2OmF ztN48HqnspqBw== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1pZ5jc-0000hz-1Q; 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, Alexandre Bailon , Luca Ceresoli Subject: [PATCH v2 04/23] interconnect: imx: fix registration race Date: Mon, 6 Mar 2023 08:56:32 +0100 Message-Id: <20230306075651.2449-5-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?1759604409764054843?= X-GMAIL-MSGID: =?utf-8?q?1759604409764054843?= 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. Switch to using the new API where the provider is not registered until after it has been fully initialised. Fixes: f0d8048525d7 ("interconnect: Add imx core driver") Cc: stable@vger.kernel.org # 5.8 Cc: Alexandre Bailon Reviewed-by: Konrad Dybcio Tested-by: Luca Ceresoli Signed-off-by: Johan Hovold Tested-by: Luca Ceresoli --- drivers/interconnect/imx/imx.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/interconnect/imx/imx.c b/drivers/interconnect/imx/imx.c index 823d9be9771a..979ed610f704 100644 --- a/drivers/interconnect/imx/imx.c +++ b/drivers/interconnect/imx/imx.c @@ -295,6 +295,9 @@ int imx_icc_register(struct platform_device *pdev, provider->xlate = of_icc_xlate_onecell; provider->data = data; provider->dev = dev->parent; + + icc_provider_init(provider); + platform_set_drvdata(pdev, imx_provider); if (settings) { @@ -306,20 +309,18 @@ int imx_icc_register(struct platform_device *pdev, } } - ret = icc_provider_add(provider); - if (ret) { - dev_err(dev, "error adding interconnect provider: %d\n", ret); + ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + if (ret) return ret; - } - ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + ret = icc_provider_register(provider); if (ret) - goto provider_del; + goto err_unregister_nodes; return 0; -provider_del: - icc_provider_del(provider); +err_unregister_nodes: + imx_icc_unregister_nodes(&imx_provider->provider); return ret; } EXPORT_SYMBOL_GPL(imx_icc_register); @@ -328,9 +329,8 @@ void imx_icc_unregister(struct platform_device *pdev) { struct imx_icc_provider *imx_provider = platform_get_drvdata(pdev); + icc_provider_deregister(&imx_provider->provider); imx_icc_unregister_nodes(&imx_provider->provider); - - icc_provider_del(&imx_provider->provider); } EXPORT_SYMBOL_GPL(imx_icc_unregister);