net: mvneta: mvneta_tx_done_gbe() cleanups

/* Handle tx done - called in softirq context. The <cause_tx_done> argument

 * must be a valid cause according to MVNETA_TXQ_INTR_MASK_ALL.

 */

static u32 mvneta_tx_done_gbe(struct mvneta_port *pp, u32 cause_tx_done,

			      int *tx_todo)

static void mvneta_tx_done_gbe(struct mvneta_port *pp, u32 cause_tx_done)

{

	struct mvneta_tx_queue *txq;

	u32 tx_done = 0;

	struct netdev_queue *nq;

	*tx_todo = 0;

	while (cause_tx_done) {

		txq = mvneta_tx_done_policy(pp, cause_tx_done);

		nq = netdev_get_tx_queue(pp->dev, txq->id);

		__netif_tx_lock(nq, smp_processor_id());

		if (txq->count) {

			tx_done += mvneta_txq_done(pp, txq);

			*tx_todo += txq->count;

		}

		if (txq->count)

			mvneta_txq_done(pp, txq);

		__netif_tx_unlock(nq);

		cause_tx_done &= ~((1 << txq->id));

	}

	return tx_done;

}

/* Compute crc8 of the specified address, using a unique algorithm ,

	/* Release Tx descriptors */

	if (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL) {

		int tx_todo = 0;

		mvneta_tx_done_gbe(pp, (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL), &tx_todo);

		mvneta_tx_done_gbe(pp, (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL));

		cause_rx_tx &= ~MVNETA_TX_INTR_MASK_ALL;

	}