K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2021-09-04T03:30:40.257628Z
K 7
svn:log
V 821
cam(4): Fix quick unplug/replug for SCSI.

If some device is plugged back in after unplug before the probe periph
destroyed, it will just restart the probe process. But I've found that
PROBE_INQUIRY_CKSUM flag not cleared between the iterations may cause
AC_FOUND_DEVICE not reported on the second iteration, and because of
AC_LOST_DEVICE reported during the first iteration, the device end up
configured, but without any periphs attached.

We've found that enabled serial console and 102-disk JBOD cause enough
probe delays to easily trigger the issue for half of the disks.  This
change fixes it reliably on my tests.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.

(cherry picked from commit 84d5b6bd68ce6496592adb8fdcd8cf0c246ed935)

Git Hash:   70d16ac0e889b88693d75c3541c6156355314124
Git Author: mav@FreeBSD.org
END