This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag 'verification-needed-xenial' to 'verification-failed-
xenial'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-xenial

** Tags added: verification-needed-yakkety

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https://bugs.launchpad.net/bugs/1656913

Title:
  NVMe: adapter is missing after abnormal shutdown followed by quick
  reboot, quirk needed

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Canonical, we would like to request the merge of the following patch
  to Xenial (4.4.0-x) and Yakkety (4.8.0-y) kernels if possible.

  b5a10c5f75 ("nvme: apply DELAY_BEFORE_CHK_RDY quirk at probe time too")
  
[https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b5a10c5]

  This is a very non-intrusive patch, just extending a quirk already
  present - without this patch, after an abnormal shutdown of the
  machine (followed by a quick reboot), the NVMe device from HGST
  becomes unresponsive and we need to force a PCI rescan as workaround,
  a procedure that does not always work.

  Thanks in advance,

  
  Guilherme

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