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=-5.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 642ECC76191 for ; Wed, 24 Jul 2019 17:25:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D31C229ED for ; Wed, 24 Jul 2019 17:25:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563989133; bh=YymAhmHDxUWIUcOOfNXSzHixv8ogCiB0eKvQ24FxcNs=; h=Subject:To:References:From:Date:In-Reply-To:List-ID:From; b=mVymx2Pu6nKD4/GlpVG6iSnznIEoR+LRjd6B8VexuZS7K2mRxticNM1Cxp8RjMY2o 5wnel6fPLGWXy1QTAQgoF52rHNrQXUKDWk3lrVe6iCFggnUGKeuoDT/gW14XqFa1JG QOa3Ew/+Dwat6MLpH2v3mcK9P7jFjl6KvF/JDoHU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726631AbfGXRZc (ORCPT ); Wed, 24 Jul 2019 13:25:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:33354 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725944AbfGXRZc (ORCPT ); Wed, 24 Jul 2019 13:25:32 -0400 Received: from [10.84.150.89] (unknown [167.220.148.89]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9064222387; Wed, 24 Jul 2019 17:25:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563989131; bh=YymAhmHDxUWIUcOOfNXSzHixv8ogCiB0eKvQ24FxcNs=; h=Subject:To:References:From:Date:In-Reply-To:From; b=MAg5f5uAxCYetoBOVINOdCTKRWoLmTcFmump7tZvOHIwFXEz4tLEcmEQjSpQlbFFF jAhXVzNocg5ktbCyXz8DOMz5BNa3SLWTdOM2zWG14A8LCc9zbxVljBRa4TAzpnzd6d Q/SWx5AxvKQM9eRrowfuD5j/1brTEQFqCC/X4YAY= Subject: Re: [PATCH v2] dma: qcom: hidma_mgmt: Add of_node_put() before goto To: Nishka Dasgupta , agross@kernel.org, vkoul@kernel.org, dan.j.williams@intel.com, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, dmaengine@vger.kernel.org References: <20190724081609.9724-1-nishkadg.linux@gmail.com> From: Sinan Kaya Openpgp: preference=signencrypt Autocrypt: addr=okaya@kernel.org; keydata= mQENBFrnOrUBCADGOL0kF21B6ogpOkuYvz6bUjO7NU99PKhXx1MfK/AzK+SFgxJF7dMluoF6 uT47bU7zb7HqACH6itTgSSiJeSoq86jYoq5s4JOyaj0/18Hf3/YBah7AOuwk6LtV3EftQIhw 9vXqCnBwP/nID6PQ685zl3vH68yzF6FVNwbDagxUz/gMiQh7scHvVCjiqkJ+qu/36JgtTYYw 8lGWRcto6gr0eTF8Wd8f81wspmUHGsFdN/xPsZPKMw6/on9oOj3AidcR3P9EdLY4qQyjvcNC V9cL9b5I/Ud9ghPwW4QkM7uhYqQDyh3SwgEFudc+/RsDuxjVlg9CFnGhS0nPXR89SaQZABEB AAG0HVNpbmFuIEtheWEgPG9rYXlhQGtlcm5lbC5vcmc+iQFOBBMBCAA4FiEEYdOlMSE+a7/c ckrQvGF4I+4LAFcFAlztcAoCGwMFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AACgkQvGF4I+4L AFfidAf/VKHInxep0Z96iYkIq42432HTZUrxNzG9IWk4HN7c3vTJKv2W+b9pgvBF1SmkyQSy 8SJ3Zd98CO6FOHA1FigFyZahVsme+T0GsS3/OF1kjrtMktoREr8t0rK0yKpCTYVdlkHadxmR Qs5xLzW1RqKlrNigKHI2yhgpMwrpzS+67F1biT41227sqFzW9urEl/jqGJXaB6GV+SRKSHN+ ubWXgE1NkmfAMeyJPKojNT7ReL6eh3BNB/Xh1vQJew+AE50EP7o36UXghoUktnx6cTkge0ZS qgxuhN33cCOU36pWQhPqVSlLTZQJVxuCmlaHbYWvye7bBOhmiuNKhOzb3FcgT7kBDQRa5zq1 AQgAyRq/7JZKOyB8wRx6fHE0nb31P75kCnL3oE+smKW/sOcIQDV3C7mZKLf472MWB1xdr4Tm eXeL/wT0QHapLn5M5wWghC80YvjjdolHnlq9QlYVtvl1ocAC28y43tKJfklhHiwMNDJfdZbw 9lQ2h+7nccFWASNUu9cqZOABLvJcgLnfdDpnSzOye09VVlKr3NHgRyRZa7me/oFJCxrJlKAl 2hllRLt0yV08o7i14+qmvxI2EKLX9zJfJ2rGWLTVe3EJBnCsQPDzAUVYSnTtqELu2AGzvDiM gatRaosnzhvvEK+kCuXuCuZlRWP7pWSHqFFuYq596RRG5hNGLbmVFZrCxQARAQABiQEfBBgB CAAJBQJa5zq1AhsMAAoJELxheCPuCwBX2UYH/2kkMC4mImvoClrmcMsNGijcZHdDlz8NFfCI gSb3NHkarnA7uAg8KJuaHUwBMk3kBhv2BGPLcmAknzBIehbZ284W7u3DT9o1Y5g+LDyx8RIi e7pnMcC+bE2IJExCVf2p3PB1tDBBdLEYJoyFz/XpdDjZ8aVls/pIyrq+mqo5LuuhWfZzPPec 9EiM2eXpJw+Rz+vKjSt1YIhg46YbdZrDM2FGrt9ve3YaM5H0lzJgq/JQPKFdbd5MB0X37Qc+ 2m/A9u9SFnOovA42DgXUyC2cSbIJdPWOK9PnzfXqF3sX9Aol2eLUmQuLpThJtq5EHu6FzJ7Y L+s0nPaNMKwv/Xhhm6Y= Message-ID: Date: Wed, 24 Jul 2019 13:25:29 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190724081609.9724-1-nishkadg.linux@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On 7/24/2019 4:16 AM, Nishka Dasgupta wrote: > Each iteration of for_each_available_child_of_node puts the previous > node, but in the case of a goto from the middle of the loop, there is > no put, thus causing a memory leak. > Hence add an of_node_put under the label that the gotos point to. > In order to avoid decrementing an already-decremented refcount, copy the > original contents of the label (including the return statement) to just > above the label, so that the code under the label is executed only when > a goto exit from the loop occurs. > Additionally, remove an unnecessary get/put pair from the loop, as the > loop itself already keeps track of refcount. > Issue found with Coccinelle. > > Signed-off-by: Nishka Dasgupta nit: please post v3 with dmaengine:qcom:hidma_mgmt:.... Vinod doesn't like commit subjectss in this directory to have dma name on it. You can keep my acked-by. Acked-by: Sinan Kaya