K 10
svn:author
V 6
mjacob
K 8
svn:date
V 27
2006-10-01T20:23:50.000000Z
K 7
svn:log
V 522
Put a bit of hysteresis into both BUSY SCSI status returns
and CAM_RESRC_UNAVAIL returns. Delay a tunable amount for
either between retries.

This came up because the MPT IOC was returning "IOC out of
resources" for some user and this caused a CAM_RESRC_UNAVAIL
return. Putting a bit of delay between retries helped them
out.

There was some discussion that an async event should be used
to clear CAM_RESRC_UNAVAIL. That's probably a better notion
eventually.

Reviewed by:	scsi@freebsd.org (ade, scott)
MFC after:	1 week

END