static int iss_net_rx()

in platforms/iss/network.c [273:312]

• 28 lines of code
• 4 McCabe index (conditional complexity)

static int iss_net_rx(struct net_device *dev)
{
	struct iss_net_private *lp = netdev_priv(dev);
	int pkt_len;
	struct sk_buff *skb;

	/* Check if there is any new data. */

	if (lp->tp.poll(lp) == 0)
		return 0;

	/* Try to allocate memory, if it fails, try again next round. */

	skb = dev_alloc_skb(dev->mtu + 2 + ETH_HEADER_OTHER);
	if (skb == NULL) {
		lp->stats.rx_dropped++;
		return 0;
	}

	skb_reserve(skb, 2);

	/* Setup skb */

	skb->dev = dev;
	skb_reset_mac_header(skb);
	pkt_len = lp->tp.read(lp, &skb);
	skb_put(skb, pkt_len);

	if (pkt_len > 0) {
		skb_trim(skb, pkt_len);
		skb->protocol = lp->tp.protocol(skb);

		lp->stats.rx_bytes += skb->len;
		lp->stats.rx_packets++;
		netif_rx_ni(skb);
		return pkt_len;
	}
	kfree_skb(skb);
	return pkt_len;
}