+ /*
+ * PPT desktop boards DH77EB and DH77DF will power back on after
+ * a few seconds of being shutdown. The fix for this is to
+ * switch the ports from xHCI to EHCI on shutdown. We can't use
+ * DMI information to find those particular boards (since each
+ * vendor will change the board name), so we have to key off all
+ * PPT chipsets.
+ */
+ xhci->quirks |= XHCI_SPURIOUS_REBOOT;