+static int rx_handler(struct rtase_ring *ring, int budget)
+{
+ union rtase_rx_desc *desc_base = ring->desc;
+ u32 pkt_size, cur_rx, delta, entry, status;
+ struct rtase_private *tp = ring->ivec->tp;
+ struct net_device *dev = tp->dev;
+ union rtase_rx_desc *desc;
+ struct sk_buff *skb;
+ int workdone = 0;
+
+ cur_rx = ring->cur_idx;
+ entry = cur_rx % RTASE_NUM_DESC;
+ desc = &desc_base[entry];
+
+ do {
+ status = le32_to_cpu(desc->desc_status.opts1);
+
+ if (status & RTASE_DESC_OWN)
+ break;
+
+ /* This barrier is needed to keep us from reading
+ * any other fields out of the rx descriptor until
+ * we know the status of RTASE_DESC_OWN
+ */
+ dma_rmb();
+
+ if (unlikely(status & RTASE_RX_RES)) {
+ if (net_ratelimit())
+ netdev_warn(dev, "Rx ERROR. status = %08x\n",
+ status);
+
+ tp->stats.rx_errors++;
+
+ if (status & (RTASE_RX_RWT | RTASE_RX_RUNT))
+ tp->stats.rx_length_errors++;
+
+ if (status & RTASE_RX_CRC)
+ tp->stats.rx_crc_errors++;
+
+ if (dev->features & NETIF_F_RXALL)
+ goto process_pkt;
+
+ rtase_mark_to_asic(desc, tp->rx_buf_sz);
+ goto skip_process_pkt;
+ }
+
+process_pkt:
+ pkt_size = status & RTASE_RX_PKT_SIZE_MASK;
+ if (likely(!(dev->features & NETIF_F_RXFCS)))
+ pkt_size -= ETH_FCS_LEN;
+
+ /* The driver does not support incoming fragmented frames.
+ * They are seen as a symptom of over-mtu sized frames.
+ */
+ if (unlikely(rtase_fragmented_frame(status))) {
+ tp->stats.rx_dropped++;
+ tp->stats.rx_length_errors++;
+ rtase_mark_to_asic(desc, tp->rx_buf_sz);
+ goto skip_process_pkt;
+ }
+
+ dma_sync_single_for_cpu(&tp->pdev->dev,
+ ring->mis.data_phy_addr[entry],
+ tp->rx_buf_sz, DMA_FROM_DEVICE);
+
+ skb = build_skb(ring->data_buf[entry], PAGE_SIZE);
+ if (!skb) {
+ netdev_err(dev, "skb build failed\n");