[Bug 208327] xhci_hcd issue transfer event - usb3.0

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https://bugzilla.kernel.org/show_bug.cgi?id=208327

--- Comment #6 from Mathias Nyman (mathias.nyman@xxxxxxxxxxxxxxx) ---
Could you please dump the event ring ringht after seeing the 
"Transfer event TRB DMA ptr not part of current TD.." message. 
Just to verify hardware actually writes duplicate events on the ring buffer.

This can be done by:
mount -t debugfs none /sys/kernel/debug
cat /sys/kernel/debug/usb/xhci/0000:00:14.0/event-ring/trbs

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