From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60161) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y9Gzn-0003uh-2d for qemu-devel@nongnu.org; Thu, 08 Jan 2015 12:35:56 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Y9Gzc-0006cf-Qu for qemu-devel@nongnu.org; Thu, 08 Jan 2015 12:35:43 -0500 Received: from e9.ny.us.ibm.com ([32.97.182.139]:46500) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y9Gzc-0006cA-Fi for qemu-devel@nongnu.org; Thu, 08 Jan 2015 12:35:32 -0500 Received: from /spool/local by e9.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 8 Jan 2015 12:35:31 -0500 From: Michael Roth Date: Thu, 8 Jan 2015 11:33:39 -0600 Message-Id: <1420738472-23267-36-git-send-email-mdroth@linux.vnet.ibm.com> In-Reply-To: <1420738472-23267-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1420738472-23267-1-git-send-email-mdroth@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 35/88] virtio-serial: fix virtio-serial child refcount in transports List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org From: Gonglei object_initialize() leaves the object with a refcount of 1. object_property_add_child() adds its own reference which is dropped again when the property is deleted. The upshot of this is that we always have a refcount >= 1. Upon hot unplug the virtio-serial child is not finalized! Drop our reference after the child property has been added to the parent. Signed-off-by: Gonglei Reviewed-by: Cornelia Huck Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini (cherry picked from commit e77ca8b92af8a5213897331d676089e8919f383d) Signed-off-by: Michael Roth --- hw/s390x/s390-virtio-bus.c | 1 + hw/s390x/virtio-ccw.c | 1 + hw/virtio/virtio-pci.c | 1 + 3 files changed, 3 insertions(+) diff --git a/hw/s390x/s390-virtio-bus.c b/hw/s390x/s390-virtio-bus.c index 31f5286..422402e 100644 --- a/hw/s390x/s390-virtio-bus.c +++ b/hw/s390x/s390-virtio-bus.c @@ -227,6 +227,7 @@ static void s390_virtio_serial_instance_init(Object *obj) object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); qdev_alias_all_properties(DEVICE(&dev->vdev), obj); + object_unref(OBJECT(&dev->vdev)); } static int s390_virtio_scsi_init(VirtIOS390Device *s390_dev) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 271104d..5d7f3a6 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -853,6 +853,7 @@ static void virtio_ccw_serial_instance_init(Object *obj) object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); qdev_alias_all_properties(DEVICE(&dev->vdev), obj); + object_unref(OBJECT(&dev->vdev)); } static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index db085d5..4d830aa 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1412,6 +1412,7 @@ static void virtio_serial_pci_instance_init(Object *obj) object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); qdev_alias_all_properties(DEVICE(&dev->vdev), obj); + object_unref(OBJECT(&dev->vdev)); } static const TypeInfo virtio_serial_pci_info = { -- 1.9.1