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 X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5CE9FC433E1 for ; Mon, 15 Jun 2020 07:41:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 308E12067B for ; Mon, 15 Jun 2020 07:41:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=web.de header.i=@web.de header.b="Zr9HGQbq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728774AbgFOHl5 (ORCPT ); Mon, 15 Jun 2020 03:41:57 -0400 Received: from mout.web.de ([212.227.15.4]:36859 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728496AbgFOHll (ORCPT ); Mon, 15 Jun 2020 03:41:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1592206866; bh=bItkEfVhTtW3qhNuAqeugRekO6eOCtuOduTADC0Dxpo=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=Zr9HGQbqrU9fyeP4eO2ZtJrBxH8XaC0ynw0tq5V0+wzIpUJiXLRbt1y2LYOa8ei4b iS9HAJ7mN4kR9zTAJ1ubULFO6wsLGMtofBN0a56KNo8CTdRMPaFjdB8jGj8SoPhcbO qWwKneuMOCgFwl8ZifRNCyt/xJyU/L9IiFfxHQ1k= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.2] ([78.49.107.236]) by smtp.web.de (mrweb003 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MSrll-1jIzl12fBd-00RtLL; Mon, 15 Jun 2020 09:41:06 +0200 Subject: Re: [v3] i2c: imx-lpi2c: Fix runtime PM imbalance on error To: Wolfram Sang , linux-pm@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Aisheng Dong , Dinghao Liu , Ulf Hansson , "Rafael J . Wysocki" , Shawn Guo , Sascha Hauer , Fabio Estevam , Andy Duan , linux-kernel@vger.kernel.org, Qiushi Wu , Navid Emamdoost , Kangjie Lu , Aditya Pakki References: <20200601061640.27632-1-dinghao.liu@zju.edu.cn> <20200614091203.GC2878@kunai> <20200615070613.GA1497@kunai> From: Markus Elfring Autocrypt: addr=Markus.Elfring@web.de; prefer-encrypt=mutual; keydata= mQINBFg2+xABEADBJW2hoUoFXVFWTeKbqqif8VjszdMkriilx90WB5c0ddWQX14h6w5bT/A8 +v43YoGpDNyhgA0w9CEhuwfZrE91GocMtjLO67TAc2i2nxMc/FJRDI0OemO4VJ9RwID6ltwt mpVJgXGKkNJ1ey+QOXouzlErVvE2fRh+KXXN1Q7fSmTJlAW9XJYHS3BDHb0uRpymRSX3O+E2 lA87C7R8qAigPDZi6Z7UmwIA83ZMKXQ5stA0lhPyYgQcM7fh7V4ZYhnR0I5/qkUoxKpqaYLp YHBczVP+Zx/zHOM0KQphOMbU7X3c1pmMruoe6ti9uZzqZSLsF+NKXFEPBS665tQr66HJvZvY GMDlntZFAZ6xQvCC1r3MGoxEC1tuEa24vPCC9RZ9wk2sY5Csbva0WwYv3WKRZZBv8eIhGMxs rcpeGShRFyZ/0BYO53wZAPV1pEhGLLxd8eLN/nEWjJE0ejakPC1H/mt5F+yQBJAzz9JzbToU 5jKLu0SugNI18MspJut8AiA1M44CIWrNHXvWsQ+nnBKHDHHYZu7MoXlOmB32ndsfPthR3GSv jN7YD4Ad724H8fhRijmC1+RpuSce7w2JLj5cYj4MlccmNb8YUxsE8brY2WkXQYS8Ivse39MX BE66MQN0r5DQ6oqgoJ4gHIVBUv/ZwgcmUNS5gQkNCFA0dWXznQARAQABtCZNYXJrdXMgRWxm cmluZyA8TWFya3VzLkVsZnJpbmdAd2ViLmRlPokCVAQTAQgAPhYhBHDP0hzibeXjwQ/ITuU9 Figxg9azBQJYNvsQAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEOU9Figx g9azcyMP/iVihZkZ4VyH3/wlV3nRiXvSreqg+pGPI3c8J6DjP9zvz7QHN35zWM++1yNek7Ar OVXwuKBo18ASlYzZPTFJZwQQdkZSV+atwIzG3US50ZZ4p7VyUuDuQQVVqFlaf6qZOkwHSnk+ CeGxlDz1POSHY17VbJG2CzPuqMfgBtqIU1dODFLpFq4oIAwEOG6fxRa59qbsTLXxyw+PzRaR LIjVOit28raM83Efk07JKow8URb4u1n7k9RGAcnsM5/WMLRbDYjWTx0lJ2WO9zYwPgRykhn2 sOyJVXk9xVESGTwEPbTtfHM+4x0n0gC6GzfTMvwvZ9G6xoM0S4/+lgbaaa9t5tT/PrsvJiob kfqDrPbmSwr2G5mHnSM9M7B+w8odjmQFOwAjfcxoVIHxC4Cl/GAAKsX3KNKTspCHR0Yag78w i8duH/eEd4tB8twcqCi3aCgWoIrhjNS0myusmuA89kAWFFW5z26qNCOefovCx8drdMXQfMYv g5lRk821ZCNBosfRUvcMXoY6lTwHLIDrEfkJQtjxfdTlWQdwr0mM5ye7vd83AManSQwutgpI q+wE8CNY2VN9xAlE7OhcmWXlnAw3MJLW863SXdGlnkA3N+U4BoKQSIToGuXARQ14IMNvfeKX NphLPpUUnUNdfxAHu/S3tPTc/E/oePbHo794dnEm57LuuQINBFg2+xABEADZg/T+4o5qj4cw nd0G5pFy7ACxk28mSrLuva9tyzqPgRZ2bdPiwNXJUvBg1es2u81urekeUvGvnERB/TKekp25 4wU3I2lEhIXj5NVdLc6eU5czZQs4YEZbu1U5iqhhZmKhlLrhLlZv2whLOXRlLwi4jAzXIZAu 76mT813jbczl2dwxFxcT8XRzk9+dwzNTdOg75683uinMgskiiul+dzd6sumdOhRZR7YBT+xC wzfykOgBKnzfFscMwKR0iuHNB+VdEnZw80XGZi4N1ku81DHxmo2HG3icg7CwO1ih2jx8ik0r riIyMhJrTXgR1hF6kQnX7p2mXe6K0s8tQFK0ZZmYpZuGYYsV05OvU8yqrRVL/GYvy4Xgplm3 DuMuC7/A9/BfmxZVEPAS1gW6QQ8vSO4zf60zREKoSNYeiv+tURM2KOEj8tCMZN3k3sNASfoG fMvTvOjT0yzMbJsI1jwLwy5uA2JVdSLoWzBD8awZ2X/eCU9YDZeGuWmxzIHvkuMj8FfX8cK/ 2m437UA877eqmcgiEy/3B7XeHUipOL83gjfq4ETzVmxVswkVvZvR6j2blQVr+MhCZPq83Ota xNB7QptPxJuNRZ49gtT6uQkyGI+2daXqkj/Mot5tKxNKtM1Vbr/3b+AEMA7qLz7QjhgGJcie qp4b0gELjY1Oe9dBAXMiDwARAQABiQI8BBgBCAAmFiEEcM/SHOJt5ePBD8hO5T0WKDGD1rMF Alg2+xACGwwFCQlmAYAACgkQ5T0WKDGD1rOYSw/+P6fYSZjTJDAl9XNfXRjRRyJSfaw6N1pA Ahuu0MIa3djFRuFCrAHUaaFZf5V2iW5xhGnrhDwE1Ksf7tlstSne/G0a+Ef7vhUyeTn6U/0m +/BrsCsBUXhqeNuraGUtaleatQijXfuemUwgB+mE3B0SobE601XLo6MYIhPh8MG32MKO5kOY hB5jzyor7WoN3ETVNQoGgMzPVWIRElwpcXr+yGoTLAOpG7nkAUBBj9n9TPpSdt/npfok9ZfL /Q+ranrxb2Cy4tvOPxeVfR58XveX85ICrW9VHPVq9sJf/a24bMm6+qEg1V/G7u/AM3fM8U2m tdrTqOrfxklZ7beppGKzC1/WLrcr072vrdiN0icyOHQlfWmaPv0pUnW3AwtiMYngT96BevfA qlwaymjPTvH+cTXScnbydfOQW8220JQwykUe+sHRZfAF5TS2YCkQvsyf7vIpSqo/ttDk4+xc Z/wsLiWTgKlih2QYULvW61XU+mWsK8+ZlYUrRMpkauN4CJ5yTpvp+Orcz5KixHQmc5tbkLWf x0n1QFc1xxJhbzN+r9djSGGN/5IBDfUqSANC8cWzHpWaHmSuU3JSAMB/N+yQjIad2ztTckZY pwT6oxng29LzZspTYUEzMz3wK2jQHw+U66qBFk8whA7B2uAU1QdGyPgahLYSOa4XAEGb6wbI FEE= Message-ID: <44768ceb-ee7c-85f2-6091-ec6bcd06ab54@web.de> Date: Mon, 15 Jun 2020 09:40:53 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <20200615070613.GA1497@kunai> Content-Type: text/plain; charset=windows-1252 Content-Language: en-GB Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:FuBQm1DRSSkCYJ2edMYXZR4IvGdroKwuuv04BLF5yUfFgHJ/mn+ yD3jvW29OaoGTyGy+53Tb9VbJash4lZqCw/HNyfKTmEhtIMhsEa2PSDwhiRlg5s8AI/2+nL LHwX1OD/k456WCZgpwcSRhM1lEugbwyYhKb0PTP6t4axS2GwVFWXBU8U19jyMoK0fnOEQU5 kdeP64TlrD8QanCbAxDzg== X-UI-Out-Filterresults: notjunk:1;V03:K0:NXiTrW/1b1M=:SgG+2iWLn8ElTNhwZuZrBS UY0H5Nti9xLwHfPHxBLBETlP4WJaBb2K1Qr3Pq4y0aWz7N+OSgtzmwEO2q2Pvj+YDSsyErOHB qQmiS1V0hHuRKfbLnDqsf6BcM3j0zbxbqPBRh08xgrmYRfNenVGT5t3HsZt1r+0PaNgB1rErp SaHjxuT8L/TBYbTbnDfa5LoBPRrW3jK/1SI1xPMtOnfP+jbXTbFZ052Ce48QunlB3ycJWVAI9 Tze+LsWZrTokMSEWjZzpkE+rrqyGZcUg9UBz66Nj26P9fHFUy/gPIGgWP2R1eAnrhqzkDgZyc GZgeSepUsLYp5ZXoj1d2+BRda645LYU121Txcljw0aRMDlPMvkTfxIWBRzs+lu9zizVkYSvqb 9+8dStG6yFFvxLeySVFeQ284wMc+PLvZ1BSoJ4IPAt5wlvmJV53LnGemc9lPlvmnK8u7BClXd H69TX32QTlMz204B41n2JcrAqMaHr0H9MmRzhbSXOAriTGngBWJPKwsIN7fyrQ11WDChm4M4R I4VAnLS5Yk5og4hKGKd8NhmgqgwHRWDEs1WNwuxRxhBvcWSl9xDhTTzmsc2c6XjMYDJ/AW981 +1oVOZZhr7uoGl8+XM/SrSc3jgJP9lafyz5dE+8aCXzOmQCiIh6qc3nGGFuaLpsMK587eO0qD Pne/t1wE1i1Icj7BHC/dNLiPSrKMQjG2nkTyNktD6DXmDLFnt9NBC5/DvFwX10rgaJztL0sDD Bo9fJQd2+1JhC0TsK7L8HexjTsAz7mHBxxUGxHRCjtEo20RlAcQD8kOEawedMjoYvGWqFHsFT jabT3Ow1yqv9IigwZoALXEPgVAOGZex6zrl/7nG7AQMSxgJd/aSCwnZaEDAqziF1qrMVZsPuH nfxc3yvja1BjPnYn+1yfOmMh8nZaAaQd3VBf+tkj9wA9aWSjnNb4iwUNBVnrB/DG/Neyjiqhv /NnTnTZoLEPE+Fg3tDpHA0gPmgXlF0lT6bUCMo9J29V1OfqIAy3RiTeVZFnAKOPsqU+hi78DV s64Pge9GWzxa88PE9EguTO0W9J9cevmUH+4i+E2zfY2QNfas2JmoXOD2wXOtLyQQJuOL/Tqzt iviJsFj+UQD9e89/nNXE2Tzefg6AnxVvfIbfHW4EIheLFpds22Hjs8NOSlHnxJxLUfItQUxeh /y9U7MrigPyp3RCNX8Yd8hLLy5dIoRC8AoGZS5E2gz0qlX07SmLIQ5tRO3CjJe7T+FSAld5rW u8LEQM+KET53W+4m1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I started a seperate thread: > > https://lkml.org/lkml/2020/6/14/76 > > Still, on-going discussion if the proper fix is to remove the error chec= k. I find that a bit of additional information can make such a link safer. RFC: a failing pm_runtime_get increases the refcnt? https://lore.kernel.org/lkml/20200614090751.GA2878@kunai/ How will the clarification of corresponding software aspects evolve furthe= r? Regards, Markus