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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1743053

Title:
  libata: apply MAX_SEC_1024 to all LITEON EP1 series devices

Status in linux package in Ubuntu:
  Fix Released
Status in linux-azure package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released
Status in linux-azure source package in Xenial:
  Fix Released
Status in linux source package in Artful:
  Fix Released
Status in linux source package in Bionic:
  Fix Released
Status in linux-azure source package in Bionic:
  Fix Committed

Bug description:
  == SRU Justification ==
  Some SSD drives made by LiteOn can crash the kernel due to bad drivers. This is a
  regression introduced by commit e0edc8c54646.  This regression is fixed by mainline
  commit db5ff909798, which was added to mailine in v4.15-rc9.

  This commit has already been added to Bionic via upstream stable udpates.  Xenial
  also needs this fix because it recieved the regression introducing commit e0edc8c54646
  via the 4.4.48 stable updates(See bug lp1663657).

  
  == Fix ==
  commit db5ff909798ef0099004ad50a0ff5fde92426fd1
  Author: Xinyu Lin <xinyu0123@xxxxxxxxx>
  Date:   Sun Dec 17 20:13:39 2017 +0800

      libata: apply MAX_SEC_1024 to all LITEON EP1 series devices

  == Regression Potential ==
  Low.  This commit was also cc'd to upstream stable to fix a regression, so it
  received extra upstream review.

  == Test Case ==
  A test kernel was built with this patch and tested by the original bug reporter.
  The bug reporter states the test kernel resolved the bug.


  == Original Bug Description ==
  Some SSD drives made by LiteOn can crash the kernel due to bad drivers.  A fix for this issue has been submitted upstream: https://git.kernel.org/pub/scm/linux/kernel/git/tj/libata.git/commit/?h=for-4.15-fixes

  LITEON EP1 has the same timeout issues as CX1 series devices.

  Revert max_sectors to the value of 1024.

  'e0edc8c54646 ("libata: apply MAX_SEC_1024 to all CX1-JB*-HP
  devices")'

  Signed-off-by: Xinyu Lin <xinyu0123@xxxxxxxxx>
  Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
  Cc: stable@xxxxxxxxxxxxxxx

  At a high level the root cause of this problem is that the device only
  supports commands with a transfer size up to 512KB.  This worked fine
  with older versions of Linux but newer versions are attempting
  commands with a transfer size of 1280KB which is problematic for this
  device (LITEON EP1-KB480)

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