From db7a725f294e2147c13fff55d9ad2bb8e8c86ba3 Mon Sep 17 00:00:00 2001 From: Peng Li Date: Thu, 28 Jun 2018 12:12:23 +0800 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 99bb6a82626aa..1a68952339c2a 100644 --- 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; -- 2.39.5