Wojciech Macek e0ceec676d cam: don't send scsi commands on shutdown when reboot method RB_NOSYNC
Don't send the SCSI comand SYNCHRONIZE CACHE on devices that are still
open when RB_NOSYNC is the reboot method. This may avoid recursive panics
when doadump is called due to a SCSI/CAM/USB error/bug.

Obtained from:		Semihalf
Sponsored by:		Stormshield
Reviewed by:		imp
Differential revision:	https://reviews.freebsd.org/D31549
2021-12-20 06:32:51 +01:00
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