[Bug 212021] xhci(4) broken with qemu-devel

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212021

--- Comment #11 from commit-hook at freebsd.org ---
A commit references this bug:

Author: hselasky
Date: Mon Aug 22 19:32:50 UTC 2016
New revision: 304629
URL: https://svnweb.freebsd.org/changeset/base/304629

Log:
  Don't separate the status stage of the XHCI USB control transfers into
  its own job because this breaks the simplified QEMU XHCI TRB parser,
  which expects the complete USB control transfer as a series of back to
  back TRBs. The old behaviour is kept under #ifdef in case this change
  breaks enumeration of any USB devices.

  PR:           212021
  MFC after:    1 week

Changes:
  head/sys/dev/usb/controller/xhci.c

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