K 10
svn:author
V 7
iedowse
K 8
svn:date
V 27
2006-02-26T22:38:39.000000Z
K 7
svn:log
V 414
MFC: when deregistering a bus, attempt to flush out all outstanding
operations before returning, and point the bus at a dummy cam_sim
structure. This avoids crashes in camisr() when umass devices are
unplugged during probing.

It may however be better to simply sleep in xpt_bus_deregister()
until all operations have completed, but it is still useful to have
this MFC'd in the meantime.

Approved by:	re (scottl)

END