> > ----- Forwarded message from Andi Kleen <ak@suse.de> -----
> > Someone added an test for AMD 8111 in EHCI, returning
> > an error in reset.
> >
> > When triggered it would cause an NULL pointer oops because
> > it would usb_hcd_put an half initialized hcd without
> > initialized class.  I added a new usb_hcd_free function
> > to handle such half baked objects.

Andi's diagnosis is correct -- the embedded class_device was not fully
initialized -- but the solution is wrong.  The correct patch
is below.  This was clearly my fault, an error in driver-model
programming brought on by lack of documentation about which fields in the
driver-model structures need to be set for which API calls.  (Greg, long
ago I sent you a documentation patch to try and help remedy this problem,
but it seems to have fallen by the wayside.)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>