K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2016-09-30T21:00:09.889045Z
K 7
svn:log
V 591
cam_periph_ccbwait could return while ccb in progress

In cam_periph_runccb, cam_periph_ccbwait was using the value of the ccb
pinfo.index and status fields to determine whether the ccb was done,
but these fields are updated without a contending lock and could glitch
into states that would be erroneously interpreted as done.  Instead,
have cam_periph_ccbwait look for the explicit result of the function
cam_periph_done.

Submitted by:	Ryan Libby <rlibby@gmail.com>
Reviewed by:	mav
MFC after:	3 weeks
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D8020

END