diff options
| author |   Yunsheng Lin <linyunsheng@huawei.com> | 2019-02-23 17:22:10 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-02-24 20:27:50 -0800 |
| commit | 47e7b13b0aff869465585d36a8d5075fe17cb90a (patch) | |
| tree | 5d084faddd5b53e1adb802813bb621a3531dc638 /drivers | |
| parent | net: hns3: avoid mult + div op in critical data path (diff) | |
| download | linux-dev-47e7b13b0aff869465585d36a8d5075fe17cb90a.tar.xz linux-dev-47e7b13b0aff869465585d36a8d5075fe17cb90a.zip | |
net: hns3: limit some variable scope in critical data path
This patch limits some variables' scope as much as possible in
hns3_fill_desc.
Also, only set l3_type and l4_type when necessary.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 14c3aa74c92b..a84060fd0464 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -1029,26 +1029,21 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv, struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use]; struct hns3_desc *desc = &ring->desc[ring->next_to_use]; struct device *dev = ring_to_dev(ring); - u32 ol_type_vlan_len_msec = 0; u16 bdtp_fe_sc_vld_ra_ri = 0; struct skb_frag_struct *frag; unsigned int frag_buf_num; - u32 type_cs_vlan_tso = 0; - struct sk_buff *skb; - u16 inner_vtag = 0; - u16 out_vtag = 0; - unsigned int k; - int sizeoflast; - u32 paylen = 0; + int k, sizeoflast; dma_addr_t dma; - u16 mss = 0; - u8 ol4_proto; - u8 il4_proto; - int ret; if (type == DESC_TYPE_SKB) { - skb = (struct sk_buff *)priv; - paylen = skb->len; + struct sk_buff *skb = (struct sk_buff *)priv; + u32 ol_type_vlan_len_msec = 0; + u32 type_cs_vlan_tso = 0; + u32 paylen = skb->len; + u16 inner_vtag = 0; + u16 out_vtag = 0; + u16 mss = 0; + int ret; ret = hns3_fill_desc_vtags(skb, ring, &type_cs_vlan_tso, &ol_type_vlan_len_msec, @@ -1057,6 +1052,8 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv, return ret; if (skb->ip_summed == CHECKSUM_PARTIAL) { + u8 ol4_proto, il4_proto; + skb_reset_mac_len(skb); ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto); @@ -2353,11 +2350,6 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb, return; } - l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M, - HNS3_RXD_L3ID_S); - l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M, - HNS3_RXD_L4ID_S); - ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M, HNS3_RXD_OL4ID_S); switch (ol4_type) { @@ -2366,6 +2358,11 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb, skb->csum_level = 1; /* fall through */ case HNS3_OL4_TYPE_NO_TUN: + l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M, + HNS3_RXD_L3ID_S); + l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M, + HNS3_RXD_L4ID_S); + /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */ if ((l3_type == HNS3_L3_TYPE_IPV4 || l3_type == HNS3_L3_TYPE_IPV6) && |