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[2620:137:e000::1:20]) by mx.google.com with ESMTP id nh12-20020a17090b364c00b00240d881e8d5si900876pjb.48.2023.04.06.02.12.00; Thu, 06 Apr 2023 02:12:13 -0700 (PDT) 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; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235904AbjDFJG7 (ORCPT + 99 others); Thu, 6 Apr 2023 05:06:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235870AbjDFJG5 (ORCPT ); Thu, 6 Apr 2023 05:06:57 -0400 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E350749C3; Thu, 6 Apr 2023 02:06:53 -0700 (PDT) Received: from [2a02:8108:8980:2478:8cde:aa2c:f324:937e]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1pkLZy-0003aV-S5; Thu, 06 Apr 2023 11:06:50 +0200 Message-ID: <71816e38-f919-11a4-1ac9-71416b54b243@leemhuis.info> Date: Thu, 6 Apr 2023 11:06:50 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Subject: Re: [PATCH 1/3] ARM: dts: meson: Fix the UART compatible strings Content-Language: en-US, de-DE To: =?UTF-8?Q?Ricardo_Ca=c3=b1uelo?= , Martin Blumenstingl , linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20211227180026.4068352-1-martin.blumenstingl@googlemail.com> <20211227180026.4068352-2-martin.blumenstingl@googlemail.com> <20230405132900.ci35xji3xbb3igar@rcn-XPS-13-9305> <44556911-e56e-6171-07dd-05cc0e30c732@collabora.com> From: Thorsten Leemhuis Cc: Greg KH , Sasha Levin , "stable@vger.kernel.org" In-Reply-To: <44556911-e56e-6171-07dd-05cc0e30c732@collabora.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1680772014;6c814293; X-HE-SMSGID: 1pkLZy-0003aV-S5 X-Spam-Status: No, score=-2.2 required=5.0 tests=NICE_REPLY_A, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 [CCing the stable list as well as Greg and Sasha so they can correct me if I write something stupid] On 06.04.23 10:27, Ricardo Cañuelo wrote: > > On 5/4/23 19:14, Thorsten Leemhuis wrote: >> Wait, what? A patch (5225e1b87432 ("ARM: dts: meson: Fix the UART >> compatible strings")) that was merged for v5.17-rc4 and is not in the >> list of patches that were in 4.14.312-rc1 >> (https://lore.kernel.org/all/20230403140351.636471867@linuxfoundation.org/ >> ) is meant to suddenly cause this? How is this possible? Am I totally on >> the wrong track here and misunderstanding something, or is this a >> bisection that went horribly sideways? > > I didn't say this was introduced in 4.14.312-rc1, this has been failing > for a long time and it was merged for 4.14.267: > https://lwn.net/Articles/884977/ > > Sorry I wasn't clear before. Ahh, no worries and thx for this. But well, in that case let me get back to something from your report: >>> KernelCI detected that this patch introduced a regression in >>> stable-rc/linux-4.14.y on a meson8b-odroidc1. >>> After this patch was applied the tests running on this platform don't >>> show any serial output. >>> >>> This doesn't happen in other stable branches nor in mainline, but 4.14 >>> hasn't still reached EOL and it'd be good to find a fix. Well, the stable maintainers may correct me if I'm wrong, but as far as I know in that case it's the duty of the stable team (which was not even CCed on the report afaics) to look into this for two reasons: * the regression does not happened in mainline (and maybe never has) * mainline developers never signed up for maintaining their work in longterm kernels; quite a few nevertheless help in situation like this, at least for recent series and if they asked for a backport through a "CC: >> #regzbot introduced: 5225e1b87432dcf0d0fc3440824b91d04c1d6cc1 Thx for getting regzbot involved, but due to your usage it now considers this a mainline regression, as 5225e1b87432 is a mainline commit. As this only happens in a particular stable tree, it should use a commit id from there instead: #regzbot introduced: 23dfa42a0a2a91d640ef3fce585194b970d8680c (above line will make regzbot adjust this) Ciao, Thorsten