multiple interface test case

[Duncan Sands]

Hi Roman,

> Here's the reduced version of your testatm_8, which doesn't touch usbatm
> at all.  I can't get it to fail with my single-interface devices.  If it
> breaks for you, we can send it to usb-devel list asking for help in
> debugging it.

thanks for this.  It hangs on rmmod on both of my multi-interface
devices.  I'm setting up kgdb now, so hopefully I'll soon know
what's going on.

Ciao,

Duncan.