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[2620:137:e000::3:1]) by mx.google.com with ESMTPS id a11-20020a65640b000000b005859c221c6dsi3224915pgv.221.2023.12.01.02.49.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Dec 2023 02:49:06 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:1 as permitted sender) client-ip=2620:137:e000::3:1; Authentication-Results: mx.google.com; dkim=pass header.i=@mailbox.org header.s=mail20150812 header.b=PNMZq2X+; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:1 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=mailbox.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by morse.vger.email (Postfix) with ESMTP id 62B73833AB0E; Fri, 1 Dec 2023 02:49:02 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at morse.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378379AbjLAKss (ORCPT + 99 others); Fri, 1 Dec 2023 05:48:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378387AbjLAKsr (ORCPT ); Fri, 1 Dec 2023 05:48:47 -0500 Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [IPv6:2001:67c:2050:0:465::201]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 959291704; Fri, 1 Dec 2023 02:48:51 -0800 (PST) Received: from smtp202.mailbox.org (smtp202.mailbox.org [IPv6:2001:67c:2050:b231:465::202]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4ShVCz1Y5jz9smg; Fri, 1 Dec 2023 11:48:47 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1701427727; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=OAm3AWMmCSZoFaeag4UwbvfiESQNmJ9RHnQR9xoyczs=; b=PNMZq2X+MZXStSKWZ7VCGPueqh+msF8bViqfNDrjLFTmh/4h0PTONnHUlZK8he5bsZkNP5 W+kdpVwqcdIcmU7ikYr9UT6hfKcdheLoPoF/E91u5mFmJK8h6BAvQxT13B+RvF/RjXS1UB 8mOGzVlof/FN0t90tcTypdqpxRqbqUE5/pMhoA8Q1YOZvFY6XS5jQakFvFasQ+PgZTF+d4 uBgIgEEYgPRYCNpBpBzIfUHy7oaoHYuf4M/NM9qurHnLMSdhUPb5YuZm/7rLLVP+NgsINu 3mgj2eCCSXhoydWqkHqgVCuvYdioGVUU2CQxk3B2AcIQ7JMJTmevgKClc2LVjg== Message-ID: <13271b9b-4132-46ef-abf8-2c311967bb46@mailbox.org> Date: Fri, 1 Dec 2023 11:48:40 +0100 MIME-Version: 1.0 Content-Language: en-US To: Linux Kernel Mailing List , linux-i2c@vger.kernel.org From: Tor Vic Subject: [Bug Report] [6.6] i2c: No atomic i2c transfer handler Cc: benjamin.bara@skidata.com, dmitry.osipenko@collabora.com Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-MBO-RS-ID: 3fe66d1d811e49dd83c X-MBO-RS-META: kc6murww4t5z7k8uojbu6ipuokawx9gi X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Fri, 01 Dec 2023 02:49:02 -0800 (PST) Hi, Since Linux 6.6.3, I see some warnings in the late phase of shutdown. Unfortunately, they are not logged because syslog has already shut down at that point. I used a camera to capture a small part of the warnings: No atomic I2C transfer handler for 'i2c-0' [trace follows] i2c_smbus_xfer [...] After checking the changelog, the culprit was found quickly: (3473cf43b) i2c: core: Run atomic i2c xfer when !preemptible Reverting that commit made the warnings go away. This is a voluntary preemption kernel running on a Skylake laptop. Please tell me if you need more info. Cheers, Tor