Hans Petter Selasky 5805d1782d Take advantage of new UCOM and bus functionality so that
the device_detach() function doesn't block on UCOM device
drivers until the TTY handle is closed by the userspace
application. This is implemented by a postpone of the
softc free where the UCOM structures reside until the
TTY references are gone.

Discussed with:	kib, ed
MFC after:	2 weeks
2012-08-10 15:29:41 +00:00
..