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[209.132.180.67]) by mx.google.com with ESMTP id e11si11077964pgi.121.2019.08.27.02.11.03; Tue, 27 Aug 2019 02:11:19 -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; 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=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729414AbfH0JJm (ORCPT + 99 others); Tue, 27 Aug 2019 05:09:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38122 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725805AbfH0JJl (ORCPT ); Tue, 27 Aug 2019 05:09:41 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9A0BB3023080; Tue, 27 Aug 2019 09:09:41 +0000 (UTC) Received: from ming.t460p (ovpn-8-27.pek2.redhat.com [10.72.8.27]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 564985D717; Tue, 27 Aug 2019 09:09:31 +0000 (UTC) Date: Tue, 27 Aug 2019 17:09:27 +0800 From: Ming Lei To: Johannes Thumshirn Cc: Thomas Gleixner , linux-kernel@vger.kernel.org, Long Li , Ingo Molnar , Peter Zijlstra , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , John Garry , Hannes Reinecke , linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org Subject: Re: [PATCH 3/4] nvme: pci: pass IRQF_RESCURE_THREAD to request_threaded_irq Message-ID: <20190827090926.GA30871@ming.t460p> References: <20190827085344.30799-1-ming.lei@redhat.com> <20190827085344.30799-4-ming.lei@redhat.com> <8837ea73-dcf5-801f-f037-267936bd65bc@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8837ea73-dcf5-801f-f037-267936bd65bc@suse.de> User-Agent: Mutt/1.11.3 (2019-02-01) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Tue, 27 Aug 2019 09:09:41 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 27, 2019 at 11:06:20AM +0200, Johannes Thumshirn wrote: > On 27/08/2019 10:53, Ming Lei wrote: > [...] > > + char *devname; > > + const struct cpumask *mask; > > + unsigned long irqflags = IRQF_SHARED; > > + int vector = pci_irq_vector(pdev, nvmeq->cq_vector); > > + > > + devname = kasprintf(GFP_KERNEL, "nvme%dq%d", nr, nvmeq->qid); > > + if (!devname) > > + return -ENOMEM; > > + > > + mask = pci_irq_get_affinity(pdev, nvmeq->cq_vector); > > + if (mask && cpumask_weight(mask) > 1) > > + irqflags |= IRQF_RESCUE_THREAD; > > + > > + return request_threaded_irq(vector, nvme_irq, NULL, irqflags, > > + devname, nvmeq); > > This will leak 'devname' which gets allocated by kasprintf() a few lines > above. It won't, please see pci_free_irq() in which free_irq() returns the 'devname' passed in. Thanks, Ming