Turn off UHCI interrupts at initialization.

The BIOS may have left the USB controller in some strange
state, and we want to fully initialize it before we are
ready to handle interrupts.

drivers/usb/host/uhci-hcd.c

@@ -2182,6 +2182,9 @@ static int uhci_reset(struct usb_hcd *hcd)
 
 	uhci->io_addr = (unsigned long) hcd->regs;
 
+	/* Turn off all interrupts */
+	outw(0, uhci->io_addr + USBINTR);
+
 	/* Maybe kick BIOS off this hardware.  Then reset, so we won't get
 	 * interrupts from any previous setup.
 	 */