dde-linux, musb driver code page faults in Routine:Main

[Bob Stewart]

I'm porting the musb driver code from Linux, using the 14.02 release of 
Genode. Basically, I'm using the main.cc code in dde-linux/src/lib/usb 
to start the usb subsystem and usb port drivers. The main.cc code is 
essentially unchanged and the start_usb_driver function is identical to 
the release code.

When running the executible containing this code a page fault occurs 
when _run is called in Routine::main(). The reason appears to be the 
schedule() function returns a pointer to 0x0 it got from _next which was 
returned from _list. The pointer in in _list appears to have been 
removed at the start main(). It looks to me like the code in main.cc in 
src/lib/usb would fail for any usb driver code. What am I missing?

Thanks,
         Bob Stewart