The BUG #1838755 is a kernel BUG (related to PCI subsystem), which is analysed 
and fix  is also provided.
The fix is reviewed by the PCI subsystem maintainers and is submitted to the 
upstream. Will share the commit id once accepted.

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https://bugs.launchpad.net/bugs/1838751

Title:
   Suspend to RAM(S3) does not wake up for latest megaraid and mpt3sas
  adapters(SAS3.5 onwards)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Latest megaraid_sas and mpt3sas adapters which support Resizable BAR
  with 1 MB BAR size fails to initialize during system resume from S3
  sleep.

  As per our findings the issue is caused by the below upstream commit:

  d3252ace0bc652a1a244455556b6a549f969bf99 ("PCI: Restore resized BAR
  state on resume")

  We see that the same commit has been ported to UBUNTU18.X - PCI:
  Restore resized BAR state on resume (bsc#1105355).

  the fix has been submitted to upstream
  https://patchwork.kernel.org/patch/11058689/

  
  please include this patch in the upcoming releases.please let me know if 
additional information required.

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