From patchwork Fri Feb 12 13:52:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 12085359 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 B7AE1C433E0 for ; Fri, 12 Feb 2021 13:57:53 +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 2B18064E70 for ; Fri, 12 Feb 2021 13:57:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B18064E70 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]:33176 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lAYxE-0000dh-6n for qemu-devel@archiver.kernel.org; Fri, 12 Feb 2021 08:57:52 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51000) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lAYsy-0004gm-CY for qemu-devel@nongnu.org; Fri, 12 Feb 2021 08:53:29 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:53301) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lAYsw-0006h3-4X for qemu-devel@nongnu.org; Fri, 12 Feb 2021 08:53:28 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613138004; 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=ZyKUyofWE67481aBG/vXPtlg6uti0I7CC265LmJLkCk=; b=Gs/FVHAzffco3mCOxcjrNO/8zKAioF3UEjeYholfk9Ji6T7mxXKe6nPEil1894HE1PlePa VOXKjsmSFII/ugUthMmggwHDyWaGO4Sk+EsBM8x2s5R0mnR4aC08dPXNR6ayXHB6sPMcpo bdNL1mllygN1cLvJ/MuId2Ja82DFDa0= 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-200-ZQ5KVyguNpKvtg8PFlQDxQ-1; Fri, 12 Feb 2021 08:53:21 -0500 X-MC-Unique: ZQ5KVyguNpKvtg8PFlQDxQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C9269107ACC7; Fri, 12 Feb 2021 13:53:19 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-112-23.ams2.redhat.com [10.36.112.23]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2B8062C154; Fri, 12 Feb 2021 13:53:10 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PATCH v3 2/4] virtio-net: add missing object_unref() Date: Fri, 12 Feb 2021 14:52:48 +0100 Message-Id: <20210212135250.2738750-3-lvivier@redhat.com> In-Reply-To: <20210212135250.2738750-1-lvivier@redhat.com> References: <20210212135250.2738750-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lvivier@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=lvivier@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.569, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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=unavailable 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: alex.williamson@redhat.com, "Michael S. Tsirkin" , qemu-trivial@nongnu.org, Jason Wang , quintela@redhat.com, Michael Tokarev , Laurent Vivier , zhengxiang9@huawei.com, jfreimann@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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 --- 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");