Comment 0 for bug 929656

== SRU Justification ==
When running Oneiric on a Chief River (Ivy Bridge/Panther Point) the following messages are printed to dmesg which are harmless but could cause user concern. It's been request we cherry-pick 3 upstream patches to eliminate these messages.

"[ 1.037314] xhci_hcd 0000:00:14.0: Failed to enable MSI-X"

"[ 1.037314] WARN: short transfer on control ep"

== Fix ==
The following upstream patches, remove these warnings:

  commit 3b9783b277e66731891ab42eeaacebbdcdd6e629
  Author: Sarah Sharp <email address hidden>
  Date: Thu Dec 22 15:02:13 2011 -0800

    xhci: Remove warnings about MSI and MSI-X capabilities.

  commit 2a9227a5eeaeb3f91e3a72ceea4fa59016ca5d20
  Author: Sarah Sharp <email address hidden>
  Date: Tue Oct 25 13:55:30 2011 +0200

    xhci: Remove scary warnings about transfer issues.

  commit d23336329fa4c157ed6256d4279a73b87486a1b6
  Author: Sarah Sharp <email address hidden>
  Date: Mon Jun 6 00:53:47 2011 -0700

    xhci: Don't warn about zeroed bMaxBurst descriptor field.

== Impact ==
There should be minimal to no risk of regression as the patches are merely lowering the log level from an error message to debug message or removing the message completely.

== Test Case ==
Boot with an unpatched kernel and confirm you see something similar to "xhci_hcd 0000:00:14.0: Failed to enable MSI-X" on boot and possibly see the "WARN: short transfer on control ep" when conducting normal operations on a USB device.