From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C673F1C03 for ; Mon, 20 Mar 2023 15:24:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3022DC433EF; Mon, 20 Mar 2023 15:24:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1679325860; bh=D6EkapIyWhW4x39keVUwiNunYJGLru/48kj7qxejMvk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K0Oav7Dw8eqSf1kBSG1/1vAzFFGZAl0J2eyIJFCKFGCwlOz4ILgjp0Tudw/AyqH5+ wNOMRejhfNcyxqJZOb8hGKSLgyGdgR5wRE9ImO1QiOTHq4T4ngSJr6cFP4IEA2PcsK Hxj3/2bHVmqih7fUtOaQZPtyWqnKcWQKX/Sghx1g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dmitry Osipenko , Krzysztof Kozlowski , Johan Hovold , Georgi Djakov Subject: [PATCH 6.1 124/198] memory: tegra20-emc: fix interconnect registration race Date: Mon, 20 Mar 2023 15:54:22 +0100 Message-Id: <20230320145512.749434238@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230320145507.420176832@linuxfoundation.org> References: <20230320145507.420176832@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Johan Hovold commit c5587f61ec050f7e9ebb3e2da29d12af63e833d3 upstream. 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 Acked-by: Krzysztof Kozlowski Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20230306075651.2449-20-johan+linaro@kernel.org Signed-off-by: Georgi Djakov Signed-off-by: Greg Kroah-Hartman --- drivers/memory/tegra/tegra20-emc.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -1034,15 +1034,13 @@ static int tegra_emc_interconnect_init(s 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"; @@ -1063,12 +1061,14 @@ static int tegra_emc_interconnect_init(s 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);