ioat_ring_active
active = ioat_ring_active(ioat_chan);
active = ioat_ring_active(ioat_chan);
if (ioat_ring_active(ioat_chan)) {
if (!ioat_ring_active(ioat_chan)) {
ioat_ring_active(ioat_chan));
return ioat_ring_size(ioat_chan) - ioat_ring_active(ioat_chan);
return sprintf(page, "%d\n", ioat_ring_active(ioat_chan));