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 CA076C7618D for ; Mon, 20 Mar 2023 09:22:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231293AbjCTJWh (ORCPT ); Mon, 20 Mar 2023 05:22:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231299AbjCTJWP (ORCPT ); Mon, 20 Mar 2023 05:22:15 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 066121688D for ; Mon, 20 Mar 2023 02:21:28 -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 dfw.source.kernel.org (Postfix) with ESMTPS id D5A42612A1 for ; Mon, 20 Mar 2023 09:21:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1B54C433D2; Mon, 20 Mar 2023 09:21:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1679304070; bh=UlL0yACnVrcDqoFzBIYpedqNHKWAgJ8McBFISyAAevA=; h=Subject:To:Cc:From:Date:From; b=1HuWdP7FOE4O4lvX+uv+RClmXBiCCokeveV2ZRUpHG7ooFnYYk9pi6VaTEHIn4Ljf u1d3hEYp6If8pfAwjkgm1IlTHlznqNO8FbrcVtNJR6ENzl08v1IhdaAz84YOUvoVwh 96zhKE1ZWZE/Pi62ZxP0iRD0WtLIIEhuV3XlHyKM= Subject: FAILED: patch "[PATCH] interconnect: qcom: rpmh: fix registration race" failed to apply to 5.15-stable tree To: johan+linaro@kernel.org, djakov@kernel.org, konrad.dybcio@linaro.org Cc: From: Date: Mon, 20 Mar 2023 10:21:07 +0100 Message-ID: <1679304067198142@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 74240a5bebd48d8b843c6d0f1acfaa722a5abeb7 # git commit -s git send-email --to '' --in-reply-to '1679304067198142@kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 74240a5bebd4 ("interconnect: qcom: rpmh: fix registration race") 6570d1d46eea ("interconnect: qcom: rpmh: fix probe child-node error handling") 4681086c9bec ("interconnect: icc-rpmh: Ignore return value of icc_provider_del() in .remove()") 57eb14779dfd ("interconnect: qcom: icc-rpmh: Support child NoC device probe") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 74240a5bebd48d8b843c6d0f1acfaa722a5abeb7 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 6 Mar 2023 08:56:38 +0100 Subject: [PATCH] interconnect: qcom: rpmh: 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: 976daac4a1c5 ("interconnect: qcom: Consolidate interconnect RPMh support") Cc: stable@vger.kernel.org # 5.7 Reviewed-by: Konrad Dybcio Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20230306075651.2449-11-johan+linaro@kernel.org Signed-off-by: Georgi Djakov diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c index 5168bbf3d92f..fdb5e58e408b 100644 --- a/drivers/interconnect/qcom/icc-rpmh.c +++ b/drivers/interconnect/qcom/icc-rpmh.c @@ -192,9 +192,10 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev) provider->pre_aggregate = qcom_icc_pre_aggregate; provider->aggregate = qcom_icc_aggregate; provider->xlate_extended = qcom_icc_xlate_extended; - INIT_LIST_HEAD(&provider->nodes); provider->data = data; + icc_provider_init(provider); + qp->dev = dev; qp->bcms = desc->bcms; qp->num_bcms = desc->num_bcms; @@ -203,10 +204,6 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev) if (IS_ERR(qp->voter)) return PTR_ERR(qp->voter); - ret = icc_provider_add(provider); - if (ret) - return ret; - for (i = 0; i < qp->num_bcms; i++) qcom_icc_bcm_init(qp->bcms[i], dev); @@ -218,7 +215,7 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev) node = icc_node_create(qn->id); if (IS_ERR(node)) { ret = PTR_ERR(node); - goto err; + goto err_remove_nodes; } node->name = qn->name; @@ -232,19 +229,27 @@ int qcom_icc_rpmh_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); - icc_provider_del(provider); + return ret; } EXPORT_SYMBOL_GPL(qcom_icc_rpmh_probe); @@ -253,8 +258,8 @@ int qcom_icc_rpmh_remove(struct platform_device *pdev) { struct qcom_icc_provider *qp = platform_get_drvdata(pdev); + icc_provider_deregister(&qp->provider); icc_nodes_remove(&qp->provider); - icc_provider_del(&qp->provider); return 0; }