K 10
svn:author
V 8
hselasky
K 8
svn:date
V 27
2014-01-07T09:52:26.520067Z
K 7
svn:log
V 310
Check the XHCI event ring regardless of the XHCI status register
value. The "Intel Lynx Point" XHCI controller found in the MBP2013 has
been observed to not always set the event interrupt bit while there
are events to consume in the event ring.

MFC after:	1 week
Tested by:	Huang Wen Hui <huanghwh@gmail.com>

END