From: Yufeng Mo moyufeng@huawei.com
commit d18e81183b1cb9c309266cbbce9acd3e0c528d04 upstream.
The hardware cannot handle short tunnel frames below 65 bytes, and will cause vlan tag missing problem. So pads packet size to 65 bytes for tunnel frames to fix this bug.
Fixes: 3db084d28dc0("net: hns3: Fix for vxlan tx checksum bug") Signed-off-by: Yufeng Mo moyufeng@huawei.com Signed-off-by: Guangbin Huang huangguangbin2@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -73,6 +73,7 @@ MODULE_PARM_DESC(tx_sgl, "Minimum number #define HNS3_OUTER_VLAN_TAG 2
#define HNS3_MIN_TX_LEN 33U +#define HNS3_MIN_TUN_PKT_LEN 65U
/* hns3_pci_tbl - PCI Device ID Table * @@ -1425,8 +1426,11 @@ static int hns3_set_l2l3l4(struct sk_buf l4.tcp->doff); break; case IPPROTO_UDP: - if (hns3_tunnel_csum_bug(skb)) - return skb_checksum_help(skb); + if (hns3_tunnel_csum_bug(skb)) { + int ret = skb_put_padto(skb, HNS3_MIN_TUN_PKT_LEN); + + return ret ? ret : skb_checksum_help(skb); + }
hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1); hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,