TX_MAX_DESC
#define desc_reclaimable(q) ((int)((q)->processed - (q)->cleaned - TX_MAX_DESC))
(txq->size > txq->in_use + TX_MAX_DESC)) {
else if ((err == 0) && (txq->size <= txq->in_use + TX_MAX_DESC) &&
#define TX_START_MIN_DESC (TX_MAX_DESC << 2)
#define TX_START_MAX_DESC (TX_MAX_DESC << 3) /* maximum number of descriptors
#define TX_CLEAN_MAX_DESC (TX_MAX_DESC << 4) /* maximum tx descriptors