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, 1 deletions

diff --git a/hw/acpi.c b/hw/acpi.c
index 0bbb2d81c4..fccae69dd6 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -548,7 +548,7 @@ i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
 
     register_savevm("piix4_pm", 0, 1, pm_save, pm_load, s);
 
-    s->smbus = i2c_init_bus();
+    s->smbus = i2c_init_bus(NULL, "i2c");
     s->irq = sci_irq;
     qemu_register_reset(piix4_reset, 0, s);