Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp5531023imm; Sun, 26 Aug 2018 22:49:06 -0700 (PDT) X-Google-Smtp-Source: ANB0VdaabwlU0mrV5KdX6XfFs+Nx9WwfaMSR62eovQ0LpXWU8vAJTGif+EyAjDSHs+5NImtZIP0I X-Received: by 2002:a63:3cc:: with SMTP id 195-v6mr10553907pgd.229.1535348946021; Sun, 26 Aug 2018 22:49:06 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1535348945; cv=none; d=google.com; s=arc-20160816; b=r0K32TT9KD/iapQyGoGmrdl/pQFL4BicQbU31Y7CH71MboS2bbeCCt2Ke1INbHPk+o vNDjbZIgfEbPnSYXzgnuVTzxlJo3euuTkxPB6f3+kev0GJ5OtGzYxR4SudU1yTKpqHF6 tmHGVHQSCVqf0EvKSrL42XcdhqmJswGtSes19ytgMNrp5+CYn10LErSrRfpx9BXxh168 LjeMDynvhmAkhAHQVIFmEEgRi8InxrJJVswMn5eyq1OhubzO6fxIlUC/RtM3H65wKYqR /v4OMmxuF6AsR84IZi5xmgXzAoQJf6Dksprdv0pCyVsAgQzFDWGKlFwEgPPKtuxw4wFT Ak8A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature:arc-authentication-results; bh=sI+atIZxjL4zBxAQL9nANcov6RIoJxFky0TXoLElePA=; b=RX2zauc/ZiOHQnanSGiKB7E0S+iOcZbmIkNClinakMjrwAWSe/nXXzYFdAnBYn6Omf o703Qt97QpmFFs7pUu971dNdEaJU1rYdm4ZbmGObqeZlGRkt0T0AiZ8f0epSh0pfClxz vzTQlQ8whdCNvYEPHQ3ZoUNeWlSObIMXdR+OkI6WmztRVjLKvdSAXlClsXuXIGwOFJE4 nT7P78T8e+zW0PHQOlFLDj8actMd1A0WPHljzatDkmhRIFIiRRMhAIp/55isgEqCYnOh 6ZfiICjg2JQsGVp1r40WQN9FgLjYZnm8m2cbSGcCLX/ogl6Uel2Bh2tQbBs7fDHUK4EF Du7A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="i/J2F8mV"; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id o12-v6si14848099pfd.142.2018.08.26.22.48.37; Sun, 26 Aug 2018 22:49:05 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="i/J2F8mV"; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726988AbeH0JcJ (ORCPT + 99 others); Mon, 27 Aug 2018 05:32:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:51048 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726776AbeH0JcJ (ORCPT ); Mon, 27 Aug 2018 05:32:09 -0400 Received: from localhost (unknown [106.200.197.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0A6FA21722; Mon, 27 Aug 2018 05:47:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1535348821; bh=hJ2Hez11lZUQXXRTshl0w0ZtmiAJ4LRd+z3gj/AJJJ8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=i/J2F8mVJhPup511hjddqhDb2Ih3fCKxnc8lYcTQxMS493Ej0SvOVsL1C8aoRMoRn CdcFt8YqZgvr8lvNlYeeARBTbCGol9UdgP06o+CBYWTjfpuCvjguY7QO/Qm/vVMpzd CKd+PNeLGjuNTGJ3mRn/avsiR2uJ46/sDhdxiCuU= Date: Mon, 27 Aug 2018 11:16:53 +0530 From: Vinod To: Huang Shijie Cc: sudeep.dutt@intel.com, ashutosh.dixit@intel.com, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] dma: mic_x100_dma: use devm_kzalloc to fix an issue Message-ID: <20180827054652.GW2388@vkoul-mobl> References: <20180822024027.8984-1-sjhuang@iluvatar.ai> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180822024027.8984-1-sjhuang@iluvatar.ai> User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 22-08-18, 10:40, Huang Shijie wrote: > The following patch introduced an issue. > commit f6206f00d8c5 ("dmaengine: mic_x100_dma: use the new helper to simplify the code") > > This issue is : > > kfree(mic_dma_dev) > ..... > dma_async_device_unregister(mic_dma_dev->device); > > Free the memory, and use it again. > > So use devm_kzalloc to allocate mic_dma_dev to fix it. > > When the Devres try to release the resources, it will call release at the > following order: > > dma_async_device_unregister(mic_dma_dev->device); > ..... > kfree(mic_dma_dev) After fixing the subsystem name, applied thanks -- ~Vinod