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Sat, 06 Feb 2021 07:40:20 -0500 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-590-Vox8_2MrOpqswkZQVzpulQ-1; Sat, 06 Feb 2021 07:40:13 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A4E3CAFA80; Sat, 6 Feb 2021 12:40:12 +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 88E795D9CC; Sat, 6 Feb 2021 12:40:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612615217; 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=AFX+Tp4cExZQWGjJG8TUCsLT+HEkCimcUQntQZrER4k0yXYx07TXoddN55vjykCLiMIlH1 ihdpQwzM1o8jC3KHs/J7kWCQvGxSUTztuDuF8zd44I/FnBenqUjG9i13hk0WNPbDOl/SWc PLACG7oQ0wxLYRHEzh5h+ti5iMOZP9w= X-MC-Unique: Vox8_2MrOpqswkZQVzpulQ-1 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PATCH 2/2] virtio-net: add missing object_unref() Date: Sat, 6 Feb 2021 13:39:55 +0100 Message-Id: <20210206123955.2196514-3-lvivier@redhat.com> In-Reply-To: <20210206123955.2196514-1-lvivier@redhat.com> References: <20210206123955.2196514-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 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 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.353, 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: qemu-trivial@nongnu.org, jfreimann@redhat.com, Laurent Vivier , quintela@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" 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=3D0000:41:00.0,id=3Dhostdev0,bus=3Droot.3= ,failover_pair_id=3Dnet0 (qemu) device_del hostdev0 We can check with "info qtree" and "info pci" that the device has been remo= ved, and then: (qemu) device_add vfio-pci,host=3D0000:41:00.0,id=3Dhostdev1,bus=3Droot.3= ,failover_pair_id=3Dnet0 Error: vfio 0000:41:00.0: device is already attached (qemu) device_add vfio-pci,host=3D0000:41:00.0,id=3Dhostdev0,bus=3Droot.3= ,failover_pair_id=3Dnet0 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 =3D qdev_device_add(opts, &err); if (err) { qemu_opts_del(opts); + } else { + object_unref(OBJECT(dev)); } } else { error_setg(errp, "Primary device not found"); --=20 2.29.2