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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1359507

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1359507

Title:
  ahci_xgene: Fix the link down in first attempt for the APM X-Gene SoC
  AHCI SATA host controller driver

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  The link down issue in first attempt happens due to 2 H/W errata
  below:

  1. Due to HW errata, during speed negotiation, sometimes controller
  is not able to detect ALIGN at GEN3(6Gbps) within 54.6us results in
  a timeout. This issue can be recovered by issuing a COMRESET again.

  2. Due to HW errata, although ALIGH detection is successfull, due to
  8b/10b and disparity BERR, sometimes the signature from the drive is
  not received successfully by the Host controller. Due to this the
  communication with the host and drive is not established due to
  locking of CDR(clock and data recovery) circuit. This issue can be
  recovered by issuing a COMRESET again.

  This patch fixes the above issues by retrying the COMRESET with a
  maximum attempts of 3.

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