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[XiongZhang <xiong.y.zhang@xxxxxxxxx>]

All the above patches enable usb 2.0 port power off mechanism. Usb 3.0
port power off is not upstream. So I change this feature's title to usb
2.0 port power off mechanism. For Usb 3.0 port power off, I will fill a
new entry.

** Summary changed:

- [Feature] USB3 Port power off mechanism 
+ [Feature] USB2.0 Port power off mechanism

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https://bugs.launchpad.net/bugs/1011415

Title:
  [Feature] USB2.0 Port power off mechanism

Status in intel:
  New
Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Raring:
  Fix Released
Status in “linux” source package in Saucy:
  Fix Released

Bug description:
  This is an Intel-specific feature.  When a USB port is powered off, VBUS is
  removed, and port events are lost (device connect & disconnect, remote wake
  from USB device suspend, and overcurrent events).  OEMs may power-gang several
  ports together, so VBUS may not be removed until several ports are powered off.

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