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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 EB7DEC282DA for ; Wed, 17 Apr 2019 13:34:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BD7D2206B6 for ; Wed, 17 Apr 2019 13:34:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=web.de header.i=@web.de header.b="TpzO2TJI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732263AbfDQNeX (ORCPT ); Wed, 17 Apr 2019 09:34:23 -0400 Received: from mout.web.de ([212.227.15.14]:58725 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729395AbfDQNeX (ORCPT ); Wed, 17 Apr 2019 09:34:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1555508037; bh=jeHayOfdlzOXU5AkN9VyN6oM+YUPMiiBzPcQ1CTi91o=; h=X-UI-Sender-Class:Cc:References:Subject:To:From:Date:In-Reply-To; b=TpzO2TJIxFlgN9YXg45N7Srum4LpGoiFF4wyT1tL8IAh2jwVmFRqOKhlxGcKBDj/B i7cjYYJAe0YFBjr9F9lAx10i5C3+xeWL6Z6KO6QYBwnv6dsGCFSuOyWMv63RDp7Fqq iHwEYkqSTRyzAwQEF6Ij7Que82svA8owugST1qBA= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.3] ([93.135.118.230]) by smtp.web.de (mrweb003 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MMEyj-1hDBnc0bdN-0083Kw; Wed, 17 Apr 2019 15:33:57 +0200 Cc: linux-kernel@vger.kernel.org, =?UTF-8?B?SsO2cmcgUsO2ZGVs?= , Matthias Brugger , Yi Wang References: <1555468879-34684-1-git-send-email-wen.yang99@zte.com.cn> Subject: Re: [PATCH] iommu/mediatek: fix leaked of_node references To: Wen Yang , iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org From: Markus Elfring Openpgp: preference=signencrypt Autocrypt: addr=Markus.Elfring@web.de; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <1555468879-34684-1-git-send-email-wen.yang99@zte.com.cn> Content-Type: text/plain; charset=utf-8 Content-Language: en-US X-Provags-ID: V03:K1:BQi//gbAZkEPae5jl9hHfvn2nraMtA1wObJCmE3cjzllS237fdV BADaHI1oAaTteDyE/sHKTM/gwGsU6aSjTzAmqXoKPjkmxpNR//Ihx4xx5QM/8InW389RST1 84gbFOiUB+btA6KwTi8D2X6e/gsV3ZpnEMgmUNvHQW1ppGUphhJvVkIUFscrFx8K9chtn5u cxE0PD2bYPmiJspXjMkwQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:8Xm8Vf0O77k=:BGt8OPVk6gtik9/wer1Ip5 7Gfd/xvL0mBGKwgmde4h6dcwoM2cZ2VuM0hsmVwNrTi66f06QH7ncTVGvbPN6hgyTIWn+P7fy /5fPGice+9OfS2RebfxpZDQ2QrBkWzYWSyeggxRzGBAivjBm0Q+UM823C0Px1mpReSxHhmzu4 WC5knLgL541u9+dQ4ehmyl0YeDcxUUjWwisDwd4U8IbrWe+t/MIeCZZbDSsH+XdiSr1zyFJyP LT4P2m1MJdtNJHyUNvMEYr1/PlLCBcgm6iO0LImGIIR+6BTpCd+zpGvCk5PCTXw11vFMtTcOZ P2B8M945CWyxF9eqO+Uow7LtOKmGgohtPubZUJ7qHqHyBiGdxkS2cH/peWG4Km/PYx8/LBAWM c5mKfXh44d8hZ/M6Uvz2KJVq5Cb3LB6bzLqavJfV9szyb0tFfAbmpqXZKNO6E0BBxOtcuq8C8 Lef9KEBBVemqCtm3KUyCmk9AIl/g4LV6srRk7iDeIuntR0TpIfR63jm9vyFcg6FJbYfj+zT23 ETm5sCDgixM71WvrtvxkMJKzJHTcmg9Iyk++8aoVlwqVr0yNPjmeRcQ59hta7QPE8GCjiWxmz c385lnUPWugEIXR0mgyPcwhF0gcrMlULG2M0A9HOX2uEVkOV3v5G9f0KqC04U9tCNgrbS59ie y+xrWFTCYeZD57JJAZx5PZ83leAsyg4vesm/4fwa6Zp/px4t4qvgWNkfDAHR/LD6p/i6AhQnO YTWnPqFL//lTSpKx7DC+lloI3YTvugg+dt7tgAZrfB2VWJs/thdTaKDtyQZXwqVxEf86mm2O/ 5kjEHlEMeY+d1cwLeRfEnVPfuEHeBgpNo9n4jktR1N86MlpcRiWVsLXMLYkTforUV/xi3UtQg uwnSHSTAs2jjqMHcX2VBDuy2/len9lzq8e+hDVb7Xg9xrH9gmfGf3OXHlGsVz/hWQl/I6JNfi jHAaYhTZFqg== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > The call to of_parse_phandle returns a node pointer with refcount > incremented thus it must be explicitly decremented after the last > usage. Can a splitting of this information into two sentences help? > 581 static int mtk_iommu_probe(struct platform_device *pdev) > 582 { > ... I suggest to reconsider such a commit description once more. Would it be better to mention that another function call should be added in two if branches so that the exception handling would be completed (instead of copying source code where a software update should become clear also from the provided diff hunk)? Regards, Markus