Add common BusState

Implement and use a common device bus state.  The main side-effect is
that creating a bus and attaching it to a parent device are no longer
separate operations.  For legacy code we allow a NULL parent, but that
should go away eventually.

Also tweak creation code to veriry theat a device in on the right bus.

Signed-off-by: Paul Brook <paul@codesourcery.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/hw/pl022.c b/hw/pl022.c
index 20d317c116..27cb7aff64 100644
--- a/hw/pl022.c
+++ b/hw/pl022.c
@@ -297,8 +297,7 @@ static void pl022_init(SysBusDevice *dev)
                                        pl022_writefn, s);
     sysbus_init_mmio(dev, 0x1000, iomemtype);
     sysbus_init_irq(dev, &s->irq);
-    s->ssi = ssi_create_bus();
-    qdev_attach_child_bus(&dev->qdev, "ssi", s->ssi);
+    s->ssi = ssi_create_bus(&dev->qdev, "ssi");
     pl022_reset(s);
     register_savevm("pl022_ssp", -1, 1, pl022_save, pl022_load, s);
 }