qdev: device free fixups.

Two bug fixes:
 * When freeing a device we unregister even stuff we didn't register in
   the first place because the ->init() callback failed.
 * When freeing a device with child busses attached, we fail to zap the
   child bus (and the devices attached to it).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/hw/qdev.h b/hw/qdev.h
index 51d835f616..cd58fa8cf4 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -19,10 +19,16 @@ typedef struct BusState BusState;
 
 typedef struct BusInfo BusInfo;
 
+enum DevState {
+    DEV_STATE_CREATED = 1,
+    DEV_STATE_INITIALIZED,
+};
+
 /* This structure should not be accessed directly.  We declare it here
    so that it can be embedded in individual device state structures.  */
 struct DeviceState {
     const char *id;
+    enum DevState state;
     DeviceInfo *info;
     BusState *parent_bus;
     int num_gpio_out;
@@ -149,6 +155,7 @@ BusState *qdev_get_parent_bus(DeviceState *dev);
 void qbus_create_inplace(BusState *bus, BusInfo *info,
                          DeviceState *parent, const char *name);
 BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name);
+void qbus_free(BusState *bus);
 
 #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev)