From da5a44e8b0b727681fc33e8d94832d1cae48a788 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 22 Aug 2012 23:09:46 +0200 Subject: [PATCH] qom: object_delete should unparent the object first object_deinit is only called when the reference count goes to zero, and yet tries to do an object_unparent. Now, object_unparent either does nothing or it will decrease the reference count. Because we know the reference count is zero, the object_unparent call in object_deinit is useless. Instead, we need to disconnect the object from its parent just before we remove the last reference apart from the parent's. This happens in object_delete. Once we do this, all calls to object_unparent peppered through QEMU can go away. Signed-off-by: Paolo Bonzini Signed-off-by: Anthony Liguori --- hw/acpi_piix4.c | 1 - hw/qdev.c | 2 -- hw/shpc.c | 1 - hw/xen_platform.c | 3 --- qom/object.c | 5 ++--- 5 files changed, 2 insertions(+), 10 deletions(-) diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c index 0aace60..72d6e5c 100644 --- a/hw/acpi_piix4.c +++ b/hw/acpi_piix4.c @@ -305,7 +305,6 @@ static void acpi_piix_eject_slot(PIIX4PMState *s, unsigned slots) if (pc->no_hotplug) { slot_free = false; } else { - object_unparent(OBJECT(dev)); qdev_free(qdev); } } diff --git a/hw/qdev.c b/hw/qdev.c index b5b74b9..b5a52ac 100644 --- a/hw/qdev.c +++ b/hw/qdev.c @@ -159,7 +159,6 @@ int qdev_init(DeviceState *dev) rc = dc->init(dev); if (rc < 0) { - object_unparent(OBJECT(dev)); qdev_free(dev); return rc; } @@ -243,7 +242,6 @@ void qbus_reset_all_fn(void *opaque) int qdev_simple_unplug_cb(DeviceState *dev) { /* just zap it */ - object_unparent(OBJECT(dev)); qdev_free(dev); return 0; } diff --git a/hw/shpc.c b/hw/shpc.c index 6b9884d..a5baf24 100644 --- a/hw/shpc.c +++ b/hw/shpc.c @@ -253,7 +253,6 @@ static void shpc_free_devices_in_slot(SHPCDevice *shpc, int slot) ++devfn) { PCIDevice *affected_dev = shpc->sec_bus->devices[devfn]; if (affected_dev) { - object_unparent(OBJECT(affected_dev)); qdev_free(&affected_dev->qdev); } } diff --git a/hw/xen_platform.c b/hw/xen_platform.c index c1fe984..0d6c2ff 100644 --- a/hw/xen_platform.c +++ b/hw/xen_platform.c @@ -87,9 +87,6 @@ static void unplug_nic(PCIBus *b, PCIDevice *d, void *o) { if (pci_get_word(d->config + PCI_CLASS_DEVICE) == PCI_CLASS_NETWORK_ETHERNET) { - /* Until qdev_free includes a call to object_unparent, we call it here - */ - object_unparent(&d->qdev.parent_obj); qdev_free(&d->qdev); } } diff --git a/qom/object.c b/qom/object.c index a552be2..e3e9242 100644 --- a/qom/object.c +++ b/qom/object.c @@ -373,8 +373,6 @@ static void object_deinit(Object *obj, TypeImpl *type) if (type_has_parent(type)) { object_deinit(obj, type_get_parent(type)); } - - object_unparent(obj); } void object_finalize(void *data) @@ -411,8 +409,9 @@ Object *object_new(const char *typename) void object_delete(Object *obj) { + object_unparent(obj); + g_assert(obj->ref == 1); object_unref(obj); - g_assert(obj->ref == 0); g_free(obj); } -- 2.7.4