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=-15.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,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 785B0C433E0 for ; Thu, 18 Feb 2021 05:59:41 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D074364E33 for ; Thu, 18 Feb 2021 05:59:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D074364E33 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50356 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lCcLj-0000bd-MW for qemu-devel@archiver.kernel.org; Thu, 18 Feb 2021 00:59:39 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52500) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lCcKV-0007ca-8t for qemu-devel@nongnu.org; Thu, 18 Feb 2021 00:58:25 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:22081) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lCcKI-0006dS-VD for qemu-devel@nongnu.org; Thu, 18 Feb 2021 00:58:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613627889; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0dDQYN7LvMzlCvh4PXN73bSQLlxVGWIB7yxLeizI82Q=; b=JWmCPrkhLOIOtwBXZrbLLDzLJZ2k83G6zrn+wmmFIcTISguHcoGWhpDC4+tIun3FjlNAP4 jdAn7JvMzwa3rB28vzfTykP6TP/Pv/vBFiKaTZ2zKJl+akT4RdY2vr0s8SLr45rdV6r9C4 fwlbdYsRyT78oXvV3d695kjlwYbUPsM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-290-anPgYIc6PMm6F_dG1n4NFw-1; Thu, 18 Feb 2021 00:58:06 -0500 X-MC-Unique: anPgYIc6PMm6F_dG1n4NFw-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id D3BC1BBEE2; Thu, 18 Feb 2021 05:58:04 +0000 (UTC) Received: from [10.72.13.28] (ovpn-13-28.pek2.redhat.com [10.72.13.28]) by smtp.corp.redhat.com (Postfix) with ESMTP id 083F96267A; Thu, 18 Feb 2021 05:57:55 +0000 (UTC) Subject: Re: [PATCH v2 2/3] virtio-net: add missing object_unref() To: Laurent Vivier , qemu-devel@nongnu.org References: <20210210174518.2493928-1-lvivier@redhat.com> <20210210174518.2493928-3-lvivier@redhat.com> From: Jason Wang Message-ID: <27e955d5-c413-7cf8-3bea-ce6385b4a125@redhat.com> Date: Thu, 18 Feb 2021 13:57:51 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210210174518.2493928-3-lvivier@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Received-SPF: pass client-ip=63.128.21.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Michael S. Tsirkin" , qemu-trivial@nongnu.org, quintela@redhat.com, Michael Tokarev , Laurent Vivier , jfreimann@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2021/2/11 上午1:45, Laurent Vivier wrote: > failover_add_primary() calls qdev_device_add() and doesn't unref > the device. Because of that, when the device is unplugged a reference > is remaining and prevents the cleanup of the object. > > This prevents to be able to plugin back the failover primary device, > with errors like: > > (qemu) device_add vfio-pci,host=0000:41:00.0,id=hostdev0,bus=root.3,failover_pair_id=net0 > (qemu) device_del hostdev0 > > We can check with "info qtree" and "info pci" that the device has been removed, and then: > > (qemu) device_add vfio-pci,host=0000:41:00.0,id=hostdev1,bus=root.3,failover_pair_id=net0 > Error: vfio 0000:41:00.0: device is already attached > (qemu) device_add vfio-pci,host=0000:41:00.0,id=hostdev0,bus=root.3,failover_pair_id=net0 > qemu-kvm: Duplicate ID 'hostdev0' for device > > Fixes: 21e8709b29cd ("failover: Remove primary_dev member") > Cc: quintela@redhat.com > Signed-off-by: Laurent Vivier > Reviewed-by: Jens Freimann Acked-by: Jason Wang > --- > hw/net/virtio-net.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c > index 5150f295e8c5..1c5af08dc556 100644 > --- a/hw/net/virtio-net.c > +++ b/hw/net/virtio-net.c > @@ -862,6 +862,8 @@ static void failover_add_primary(VirtIONet *n, Error **errp) > dev = qdev_device_add(opts, &err); > if (err) { > qemu_opts_del(opts); > + } else { > + object_unref(OBJECT(dev)); > } > } else { > error_setg(errp, "Primary device not found");