CAM_XPT_PATH_ID vs. CAM_BUS_WILDCARD

[Ryan Stone]

What is the correct procedure for enumerating all CAM busses via
XPT_DEV_MATCH?  When I asked last October(1) I was told to use
CAM_BUS_WILDCARD, but when I committed my patch someone else suggested
CAM_XPT_PATH_ID.  Which is correct?

1 -- http://lists.freebsd.org/pipermail/freebsd-scsi/2010-October/004580.html
2 -- http://lists.freebsd.org/pipermail/svn-src-head/2010-November/022601.html