From mboxrd@z Thu Jan 1 00:00:00 1970 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 10E42C6FD1D for ; Mon, 20 Mar 2023 09:22:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231366AbjCTJWD (ORCPT ); Mon, 20 Mar 2023 05:22:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55470 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231330AbjCTJVU (ORCPT ); Mon, 20 Mar 2023 05:21:20 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C0B123A5D for ; Mon, 20 Mar 2023 02:21:00 -0700 (PDT) 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 0D8A4B80C88 for ; Mon, 20 Mar 2023 09:20:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E8C2C433EF; Mon, 20 Mar 2023 09:20:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1679304048; bh=KXP0oOUwPrwS39NPlGWMgEJn8Aqu7TNeLkhigC5B7oI=; h=Subject:To:Cc:From:Date:From; b=0JBJYfuhxigGq7lRl+eha8o10rezsLyJdS2FtEpNB5o3bmjeaH8SFs9O/96H8CWL2 PbHz4MgK2VwjAbOuOHUpFiz2xyf9+W56pLLyX/BMoeyb4epDwLotukHNln1Kh0GIVf CjZ12oEzeT0ng1BpcjQMSf/AuHjLqlgcqTHbe5dA= Subject: FAILED: patch "[PATCH] interconnect: qcom: rpm: fix registration race" failed to apply to 5.15-stable tree To: johan+linaro@kernel.org, djakov@kernel.org, jun.nie@linaro.org, konrad.dybcio@linaro.org Cc: From: Date: Mon, 20 Mar 2023 10:20:41 +0100 Message-ID: <167930404125184@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 90ae93d8affc1061cd87ca8ddd9a838c7d31a158 # git commit -s git send-email --to '' --in-reply-to '167930404125184@kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 90ae93d8affc ("interconnect: qcom: rpm: fix registration race") bc463201f608 ("interconnect: qcom: rpm: fix probe child-node error handling") 8ef2ca20754d ("interconnect: icc-rpm: Ignore return value of icc_provider_del() in .remove()") e39bf2972c6e ("interconnect: icc-rpm: Support child NoC device probe") 2b6c7d645118 ("interconnect: sdm660: merge common code into icc-rpm") 656ba110e164 ("interconnect: sdm660: drop default/unused values") 7ae77e60abef ("interconnect: sdm660: expand DEFINE_QNODE macros") 63e8ab610d8a ("interconnect: icc-rpm: move bus clocks handling into qnoc_probe") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 90ae93d8affc1061cd87ca8ddd9a838c7d31a158 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 6 Mar 2023 08:56:36 +0100 Subject: [PATCH] interconnect: qcom: rpm: fix registration race 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: 62feb14ee8a3 ("interconnect: qcom: Consolidate interconnect RPM support") Fixes: 30c8fa3ec61a ("interconnect: qcom: Add MSM8916 interconnect provider driver") Cc: stable@vger.kernel.org # 5.7 Reviewed-by: Konrad Dybcio Reviewed-by: Jun Nie Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20230306075651.2449-9-johan+linaro@kernel.org Signed-off-by: Georgi Djakov diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c index 91778cfcbc65..4180a06681b2 100644 --- a/drivers/interconnect/qcom/icc-rpm.c +++ b/drivers/interconnect/qcom/icc-rpm.c @@ -503,7 +503,6 @@ int qnoc_probe(struct platform_device *pdev) } provider = &qp->provider; - INIT_LIST_HEAD(&provider->nodes); provider->dev = dev; provider->set = qcom_icc_set; provider->pre_aggregate = qcom_icc_pre_bw_aggregate; @@ -511,12 +510,7 @@ int qnoc_probe(struct platform_device *pdev) provider->xlate_extended = qcom_icc_xlate_extended; provider->data = data; - ret = icc_provider_add(provider); - if (ret) { - dev_err(dev, "error adding interconnect provider: %d\n", ret); - clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks); - return ret; - } + icc_provider_init(provider); for (i = 0; i < num_nodes; i++) { size_t j; @@ -524,7 +518,7 @@ int qnoc_probe(struct platform_device *pdev) node = icc_node_create(qnodes[i]->id); if (IS_ERR(node)) { ret = PTR_ERR(node); - goto err; + goto err_remove_nodes; } node->name = qnodes[i]->name; @@ -538,20 +532,26 @@ int qnoc_probe(struct platform_device *pdev) } data->num_nodes = num_nodes; + ret = icc_provider_register(provider); + if (ret) + goto err_remove_nodes; + platform_set_drvdata(pdev, qp); /* Populate child NoC devices if any */ if (of_get_child_count(dev->of_node) > 0) { ret = of_platform_populate(dev->of_node, NULL, NULL, dev); if (ret) - goto err; + goto err_deregister_provider; } return 0; -err: + +err_deregister_provider: + icc_provider_deregister(provider); +err_remove_nodes: icc_nodes_remove(provider); clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks); - icc_provider_del(provider); return ret; } @@ -561,9 +561,9 @@ int qnoc_remove(struct platform_device *pdev) { struct qcom_icc_provider *qp = platform_get_drvdata(pdev); + icc_provider_deregister(&qp->provider); icc_nodes_remove(&qp->provider); clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks); - icc_provider_del(&qp->provider); return 0; }