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[Bug 1497878] Re: nx842: Corrupted data during uncompression due to HW issue


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wily' to 'verification-done-wily'.

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** Tags added: verification-needed-wily

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  nx842: Corrupted data during uncompression due to HW issue

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Haren Myneni <hbabu@xxxxxxxxxx> - 2015-09-19 20:35:29 ==
  ---Problem Description---
  Hardware team reported some rare data corruption during uncompression for nx842 co-processor. It might provide user with invalid data after uncompression. So the fix is add CRC support - means Linux adds CRC flag before calling the nx842 so that CRC will be added and checked during compression and uncompression calls.  

  Contact Information = hbabu@xxxxxxxxxx 
  ---uname output---
  Ubuntu 15.10
  Machine Type = power8 
  A debugger is not configured
  ---Steps to Reproduce---
   HW team reported this issue and discussed with them for the possible solution.
  Stack trace output:
  Oops output:
  System Dump Info:
    The system is not configured to capture a system dump.
  *Additional Instructions for hbabu@xxxxxxxxxx: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Haren Myneni <hbabu@xxxxxxxxxx> - 2015-09-19 20:36:14 ==
  The fix is simple with just adding CRC flags before invoking nx842 coprocessor calls. Posted patch and waiting for maintainer to get in to his tree. 


  Please include this fix in ubuntu 15.10 release.

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