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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6C5F9C61DA4 for ; Mon, 6 Mar 2023 08:01:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bPXnMKQfcX4CIGFxhbiWW2wbyHOpyw0nUz4sqtdsJiI=; b=pjussQVHsGRTf/ NrJVqmikBgYQJ8tIfytP7eTsW5D3RA35TvkWydGVGEqcGXJldHqmhVqqiyC1ITHohnUPfCFsjoYYI JUw7uBi/9pYceh0cInxJ8QKkk0rBX5dmosE/STAxcUhDJ0eDdnTY3OB5zv4vHPHKCNz2Ivc7cyERl CFA+pgS2uOHbVFgoDLy0qR1HVxffIFnGeAYhBCgj76RL0HpG3gfbRQmrwiiAgOt7QY9SaIhTHax2g s6mRt/T9eclXBy7upkl01E8dY2XJBMXw++S4AjTmSHmXSqKUmeVmwK3ponj+MaThzoWqAChO8MAMC 3wip5HIg/AFbJi8GOqeQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pZ5l6-00Bicy-Tk; Mon, 06 Mar 2023 07:59:49 +0000 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pZ5j2-00BhYR-G1 for linux-arm-kernel@lists.infradead.org; Mon, 06 Mar 2023 07:57:43 +0000 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 40833B80CB1; Mon, 6 Mar 2023 07:57:38 +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?q?Artur=20=C5=9Awigo=C5=84?= , "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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230305_235740_895676_710E4704 X-CRM114-Status: GOOD ( 13.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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: 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 --- 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); -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel