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/freebsd-9.3-release/sys/boot/ofw/libofw/
H A Dofw_disk.cdiff 237091 Thu Jun 14 18:00:18 MDT 2012 marius MFC: r236579

The workaround added in r151650 for handling firmwares that don't allow
a single device to be opened multiple times concurrently unfortunately
isn't sufficient with ZFS. This is due to the fact, that ZFS may open
different partitions of a single device simultaneously. So the best we
can do in this case is to cache the lastly used device path and close
and open devices in ofwd_strategy() as needed.

PR: 165025
Submitted by: Gavin Mu

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