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[2620:137:e000::1:20]) by mx.google.com with ESMTP id z5-20020a056402274500b0046314dd20a0si1782999edd.3.2022.11.10.20.11.47; Thu, 10 Nov 2022 20:12:13 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=OSMKMccz; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231699AbiKKDxQ (ORCPT + 93 others); Thu, 10 Nov 2022 22:53:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230055AbiKKDxO (ORCPT ); Thu, 10 Nov 2022 22:53:14 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71F66663D3 for ; Thu, 10 Nov 2022 19:53:13 -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 23200B81CE7 for ; Fri, 11 Nov 2022 03:53:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0342EC433D6; Fri, 11 Nov 2022 03:53:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668138790; bh=95ooF5RK0BvIj5js7FGC4kph04JH4S/VemwRpET9ZLE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OSMKMcczxB+kf4C9c1sW4ZPXRJzhqoVC0Z2F2Ubz/xNXGKTyEposzG1ZSLyQe8E8A nOjPV1JQ59N/tCSgpMd3q52FMELL2Ej114aVznVAsHqAI8F8HhlpRX/10z8U6KhgHP SvfgfPGT7RmUO1SlzSKTrzjLqSdWcP1JoL5GN/jzr4ak+oxsB0m0S0xoeiGsDHAAS/ aw4oMX9d2ZY7/fVwVmWg8cJzuU41On3kUvY3NwIQUWmftLDiPRPb0zEcwrDGV4Lchz Tj6lvxzSRh1w7Lbr0kmQKDaG3AGnp+MZOWhIFO/wFWTHmxAfpdF8avS/VXWLjTHHwd MfPt/6F+mK5lA== Date: Fri, 11 Nov 2022 11:53:04 +0800 From: Shawn Guo To: "Wang, Xiaolei" , l.stach@pengutronix.de Cc: s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] soc: imx8m: Increase the clock enable before reading the register Message-ID: <20221111035304.GL125525@dragon> References: <20221028041418.4033261-1-xiaolei.wang@windriver.com> <20221111024607.GH125525@dragon> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 11, 2022 at 11:01:15AM +0800, Wang, Xiaolei wrote: > > On 11/11/2022 10:46 AM, Shawn Guo wrote: > > CAUTION: This email comes from a non Wind River email account! > > Do not click links or open attachments unless you recognize the sender and know the content is safe. > > > > On Fri, Oct 28, 2022 at 12:14:18PM +0800, Xiaolei Wang wrote: > > > When executing kdump to start the second kernel, > > > since IMX-OCOTP has turned off the clock, the clock > > > needs to be re-enabled, otherwise the system will hang. > > > > > > Fixes: ac34de14ac30 ("Revert "soc: imx8m: change to use platform driver"") > > Are you saying this fixes a regression caused by ac34de14ac30? > > > Yes, > > Although there is a problem with commit 7d981405d0fd, it also solves the > kexec kernel hang, commit 7d981405d0fd is reverted, and the kexec kernel > hang will also be introduced, so the clock needs to be enabled when the > kexec kernel starts. Ok. Lucas, Any comments here? Shawn