Clear endpoint stall on open(2) of /dev/uhidX to synchronize toggle bit

as needed on xhci(4) machines.  On non-xhci(4) we save and restore the
toggle bit on close/open of a pipe.  With xhci(4) this does not seem to
be possible, at least I haven't yet found it.  This means that on those
machines with xhci(4), after a pipe close/open, the device will use the
previous state, while xhci(4)'s state is reset to default.  By issuing
a clear endpoint stall we reset the device's toggle bit.  Now every
time a /dev/uhid is (re-)opened the state should be synchronized.

Discussed with damien@, mpi@ and Pedro Marteletto
ok markus@

0 files changed, 0 insertions, 0 deletions