From: Iyappan Subramanian <isubramanian@xxxxxxx>
Date: Mon, 16 Jun 2014 17:18:46 -0700
> +static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
> + struct net_device *ndev)
> +{
> + struct xgene_enet_pdata *pdata = netdev_priv(ndev);
> + struct xgene_enet_desc_ring *tx_ring = pdata->tx_ring;
> + struct xgene_enet_desc_ring *cp_ring = tx_ring->cp_ring;
> + u32 tx_level, cq_level;
> +
> + tx_level = xgene_enet_ring_len(tx_ring);
> + cq_level = xgene_enet_ring_len(cp_ring);
> + if (unlikely(tx_level > pdata->tx_qcnt_hi ||
> + cq_level > pdata->cp_qcnt_hi)) {
> + netif_stop_queue(ndev);
> + return NETDEV_TX_BUSY;
> + }
> +
> + if (xgene_enet_setup_tx_desc(tx_ring, skb))
> + return NETDEV_TX_OK;
If you return NETDEV_TX_OK, it is your responsibility to deal with the
SKB, because you own it.
In particular, you have to free the packet.
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