[Bug 211852] Unsafe shutdowns on Intel 750 SSD

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211852

--- Comment #10 from commit-hook at freebsd.org ---
A commit references this bug:

Author: mav
Date: Thu Feb  1 16:45:08 UTC 2018
New revision: 328684
URL: https://svnweb.freebsd.org/changeset/base/328684

Log:
  MFC r322443 (by nwhitehorn):
  Move NVME controller shutdown from being called as part of module unloading
  to being called through the newbus DEVICE_SHUTDOWN() path. This ensures that
  the NVME controller gets shut down before the device and bus disappear
  and prevents data corruption on shutdown on at least Samsung EVO 960 SSDs.

  PR:           kern/211852

Changes:
_U  stable/11/
  stable/11/sys/dev/nvme/nvme.c

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