Comment # 3 on bug 1184088 from Takashi Iwai

Ah, then it's an old bug, not the recently introduced one.

Then it's still puzzling, as there are even fewer changes about xhci.

Is it with x86, or other platform?
I'm asking it because the only generic xhci change between rc6 and rc7 is
d4a610635400ccc382792f6be69427078541c678
    xhci: fix bounce buffer usage for non-sg list case
where is very likely irrelevant, and the rest are platform-specific, either for
Mediatek, Armada 3720, Renesas, USB gadget and serial quirks, so these look
irrelevant, either.  So, none of the changes in drivers/usb/* look suspicious,
through a quick glance.