USB_STATE_URB_BUF
if (test_bit(USB_STATE_URB_BUF, &s->flags)) {
clear_bit(USB_STATE_URB_BUF, &s->flags);
set_bit(USB_STATE_URB_BUF, &s->flags);
if (stream->state & USB_STATE_URB_BUF) {
stream->state &= ~USB_STATE_URB_BUF;
stream->state |= USB_STATE_URB_BUF;
stream->state &= ~USB_STATE_URB_BUF;
stream->state |= USB_STATE_URB_BUF;
if (stream->state & USB_STATE_URB_BUF) {
if (dev->flags & USB_STATE_URB_BUF) {
dev->flags &= ~USB_STATE_URB_BUF;
dev->flags |= USB_STATE_URB_BUF;