Re: [PATCH v7 3/3] net: ax88796c: ASIX AX88796C SPI Ethernet Adapter Driver

+static int
+ax88796c_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+	skb_queue_tail(&ax_local->tx_wait_q, skb);
+	if (skb_queue_len(&ax_local->tx_wait_q) > TX_QUEUE_HIGH_WATER) {
+		netif_err(ax_local, tx_queued, ndev,
+			  "Too many TX packets in queue %d\n",
+			  skb_queue_len(&ax_local->tx_wait_q));

+		netif_stop_queue(ndev);
+	}
+
+	set_bit(EVENT_TX, &ax_local->flags);
+	schedule_work(&ax_local->ax_work);
+
+	return NETDEV_TX_OK;
+}
+
+static void
+ax88796c_skb_return(struct ax88796c_device *ax_local, struct sk_buff *skb,
+		    struct rx_header *rxhdr)
+{
+	struct net_device *ndev = ax_local->ndev;
+	int status;
+
+	do {
+		if (!(ndev->features & NETIF_F_RXCSUM))
+			break;
+
+		/* checksum error bit is set */
+		if ((rxhdr->flags & RX_HDR3_L3_ERR) ||
+		    (rxhdr->flags & RX_HDR3_L4_ERR))
+			break;
+
+		/* Other types may be indicated by more than one bit. */
+		if ((rxhdr->flags & RX_HDR3_L4_TYPE_TCP) ||
+		    (rxhdr->flags & RX_HDR3_L4_TYPE_UDP))
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+	} while (0);
+
+	ax_local->stats.rx_packets++;
+	ax_local->stats.rx_bytes += skb->len;
+	skb->dev = ndev;
+
+	skb->truesize = skb->len + sizeof(struct sk_buff);
+	skb->protocol = eth_type_trans(skb, ax_local->ndev);
+
+	netif_info(ax_local, rx_status, ndev, "< rx, len %zu, type 0x%x\n",
+		   skb->len + sizeof(struct ethhdr), skb->protocol);
+
+	status = netif_rx(skb);

+	if (status != NET_RX_SUCCESS)
+		netif_info(ax_local, rx_err, ndev,
+			   "netif_rx status %d\n", status);