ACD_URB_BUFFER_LEN
pdata->urbdata = usb_alloc_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
pdata->urbdata, ACD_URB_BUFFER_LEN, appledisplay_complete,
usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
usb_free_coherent(pdata->udev, ACD_URB_BUFFER_LEN,
ACD_URB_BUFFER_LEN, pdata->urb->actual_length);