From patchwork Wed Feb 1 10:15:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 649542 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 09861C6FA95 for ; Wed, 1 Feb 2023 10:16:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231977AbjBAKQt (ORCPT ); Wed, 1 Feb 2023 05:16:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232207AbjBAKQk (ORCPT ); Wed, 1 Feb 2023 05:16:40 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C18B58295; Wed, 1 Feb 2023 02:16:38 -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 40B72B82166; Wed, 1 Feb 2023 10:16:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7ED75C43179; Wed, 1 Feb 2023 10:16:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1675246593; bh=CAmkaGLoDox81dvLZbm9L9PKvEdTSmxQ1M1A4V7S128=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lXicU4ULDiKBdYLaI6OJLURZuf4h4Sone8mHpQvDusQheD9XUR5aRV5T8Hzl1lgHy x2S0uJ9qNzKpZivI945NV/5sfhlOc3ig6aOxo9ICkUBL/JaOrpbWSqzdzawAnAqcCS PWkdz5ikuRHr62U1fIbjZdeXnsRlNJr4wkf1DtCf3CW3rQvrc1UfxePjiiE1OMdD09 nIiNqFbgZ2rsLe/R0IGJ3t/E/cAzT3tj3sYsMMqkuIkAmdkqPjylJCRS8lgOBhhUfe Hpl+Stp1qRTh3ct/Rs+dOFwDftgTQKgfeYbD4MbTCVGEVQpRIV+IdkdnRGcBfOsAb8 4rLvopnrLdLuA== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1pNAAg-00044Z-OS; Wed, 01 Feb 2023 11:16:54 +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?QXJ0dXIgxZp3aWdvxYQ=?= , 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, Dmitry Osipenko Subject: [PATCH 20/23] memory: tegra30-emc: fix interconnect registration race Date: Wed, 1 Feb 2023 11:15:56 +0100 Message-Id: <20230201101559.15529-21-johan+linaro@kernel.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230201101559.15529-1-johan+linaro@kernel.org> References: <20230201101559.15529-1-johan+linaro@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org 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: d5ef16ba5fbe ("memory: tegra20: Support interconnect framework") Cc: stable@vger.kernel.org # 5.11 Cc: Dmitry Osipenko Signed-off-by: Johan Hovold Acked-by: Krzysztof Kozlowski --- drivers/memory/tegra/tegra30-emc.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c index 77706e9bc543..c91e9b7e2e01 100644 --- a/drivers/memory/tegra/tegra30-emc.c +++ b/drivers/memory/tegra/tegra30-emc.c @@ -1533,15 +1533,13 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) emc->provider.aggregate = soc->icc_ops->aggregate; emc->provider.xlate_extended = emc_of_icc_xlate_extended; - err = icc_provider_add(&emc->provider); - if (err) - goto err_msg; + icc_provider_init(&emc->provider); /* create External Memory Controller node */ node = icc_node_create(TEGRA_ICC_EMC); if (IS_ERR(node)) { err = PTR_ERR(node); - goto del_provider; + goto err_msg; } node->name = "External Memory Controller"; @@ -1562,12 +1560,14 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) node->name = "External Memory (DRAM)"; icc_node_add(node, &emc->provider); + err = icc_provider_register(&emc->provider); + if (err) + goto remove_nodes; + return 0; remove_nodes: icc_nodes_remove(&emc->provider); -del_provider: - icc_provider_del(&emc->provider); err_msg: dev_err(emc->dev, "failed to initialize ICC: %d\n", err);