Reference counting is supposed to keep everything important from being
deallocated until all the releases are finished. In particular, if the
hcd structure was already deallocated when usb_put_hcd() was called
then there is a refcounting bug somewhere.
That seems like a possible cause, I'll look into the refcouting.
This helps a lot. I was getting stuck with that bug.
Thanks
Just to update on this,
It appears to be caused by the same address and bandwidth mutex free bug that
you
already fixed in ab2a4bf USB: don't free bandwidth_mutex too early
The sleep() worked as it delayed freeing the primary hcd, changing the
order to first release usb3 hcd and then usb2 hcd.
-Mathias
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