K 10
svn:author
V 8
hselasky
K 8
svn:date
V 27
2012-08-10T15:29:41.210773Z
K 7
svn:log
V 348
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

END