** Tags added: originate-from-1790597 somerville

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https://bugs.launchpad.net/bugs/1806838

Title:
  Workaround CSS timeout on AMD SNPS 3.0 xHC

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux-oem package in Ubuntu:
  New

Bug description:
  [Impact]
  Raven Ridge xHC may fail to suspend, causes the USB stops working, and blocks 
the system entering system-wide suspend.

  [Fix]
  It's a hardware/firmware bug, workarounded by bailing out suspend function if 
it ever fails, and reset the xHC in next resume function.

  [Test]
  After applying the patch, the USB works, and the system can enter S3 
consecutively.

  [Regression Potential]
  Minimal. This workaround only applies to AMD Raven Ridge xHC.

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