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net: hns3: add unlikely for error check

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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>
This commit is contained in:
Peng Li 2018-06-28 12:12:23 +08:00 committed by David S. Miller
parent 94c5e53213
commit 0e6084aa1c
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
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@ -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;