multiple interface test case

[Duncan Sands]

Hi Roman, with latest -mm it hangs here:

void driver_unregister(struct device_driver * drv)
{
        bus_remove_driver(drv);
        wait_for_completion(&drv->unloaded); <=== waits for ever
}

The completion happens when driver_release is called.
Just how this gets called isn't too clear to me, but
presumably it happens automagically when the driver
refcount drops to zero.  The driver refcount gets
down to 1 only.

Ciao,

Duncan.