K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2018-04-30T23:05:57.988980Z
K 7
svn:log
V 264
Improve nvme(4) attach/detach sequences.

This change allows clean device detach on attach failures and driver unload,
while previous code tried to talk to already shut down controller, or even
accessed resources failed to allocate.

Sponsored by:	iXsystems, Inc.

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