NETBK_TX_EOI
old = atomic_fetch_or(NETBK_TX_EOI, &queue->eoi_pending);
WARN(old & NETBK_TX_EOI, "Interrupt while EOI pending\n");
atomic_andnot(NETBK_TX_EOI, &queue->eoi_pending);
else if (atomic_fetch_andnot(NETBK_TX_EOI | NETBK_COMMON_EOI,
(NETBK_TX_EOI | NETBK_COMMON_EOI))