net: hns3: add unlikely for error check

The first bd of a packet is invalid and invalid ring head for tx
IRQ is not offen, they may occur when there is error,
Add unlikely for error check branch is better for performance.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 99bb6a82626aaea4e4f67ed851ad104dde49b7e9..1a68952339c2a8207620a05995f8ab5b99e3fc33 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1917,7 +1917,7 @@ bool hns3_clean_tx_ring(struct hns3_enet_ring *ring, int budget)
        if (is_ring_empty(ring) || head == ring->next_to_clean)
                return true; /* no data to poll */
 
-       if (!is_valid_clean_head(ring, head)) {
+       if (unlikely(!is_valid_clean_head(ring, head))) {
                netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
                           ring->next_to_use, ring->next_to_clean);
 
@@ -2174,7 +2174,7 @@ static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
        bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
 
        /* Check valid BD */
-       if (!hnae_get_bit(bd_base_info, HNS3_RXD_VLD_B))
+       if (unlikely(!hnae_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
                return -EFAULT;
 
        va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;