{HEAD ~ This power state change} is communicated by {TAIL ~ the device controller} to a device driver in response to the device removal signal 
is communicated by
{ HEAD ~ This power state change } is communicated by { TAIL ~ the device controller } to a device driver in response to the device removal signal
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH