net: hns3: fix for tunnel type handling in hns3_rx_checksum

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

According to hardware user manual, the tunnel packet type is
available in the rx.ol_info field of struct hns3_desc. Currently
the tunnel packet type is decided by the rx.l234_info, which may
cause rx checksum handling error.

This patch fixes it by using the correct field in struct hns3_desc
to decide the tunnel packet type.

Fixes: 76ad4f0e ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")

Feature or Bugfix:Bugfix
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Nlipeng <lipeng321@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -2540,7 +2540,7 @@ static int hns3_gro_complete(struct sk_buff *skb)
 }
 
 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
-			     u32 l234info, u32 bd_base_info)
+			     u32 l234info, u32 bd_base_info, u32 ol_info)
 {
 	struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
 	int l3_type, l4_type;
@@ -2567,7 +2567,7 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
 		return;
 	}
 
-	ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M,
+	ol4_type = hnae3_get_field(ol_info, HNS3_RXD_OL4ID_M,
 				   HNS3_RXD_OL4ID_S);
 	switch (ol4_type) {
 	case HNS3_OL4_TYPE_MAC_IN_UDP:
@@ -2773,7 +2773,7 @@ static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
 
 static int hns3_set_gro_and_checksum(struct hns3_enet_ring *ring,
 				     struct sk_buff *skb, u32 l234info,
-				     u32 bd_base_info)
+				     u32 bd_base_info, u32 ol_info)
 {
 	u16 gro_count;
 	u32 l3_type;
@@ -2782,7 +2782,7 @@ static int hns3_set_gro_and_checksum(struct hns3_enet_ring *ring,
 				    HNS3_RXD_GRO_COUNT_S);
 	/* if there is no HW GRO, do not set gro params */
 	if (!gro_count) {
-		hns3_rx_checksum(ring, skb, l234info, bd_base_info);
+		hns3_rx_checksum(ring, skb, l234info, bd_base_info, ol_info);
 		return 0;
 	}
 
@@ -2821,7 +2821,7 @@ static int hns3_handle_bdinfo(struct hns3_enet_ring *ring, struct sk_buff *skb)
 {
 	struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
 	enum hns3_pkt_l2t_type l2_frame_type;
-	u32 bd_base_info, l234info;
+	u32 bd_base_info, l234info, ol_info;
 	struct hns3_desc *desc;
 	unsigned int len;
 	int pre_ntc, ret;
@@ -2835,6 +2835,7 @@ static int hns3_handle_bdinfo(struct hns3_enet_ring *ring, struct sk_buff *skb)
 	desc = &ring->desc[pre_ntc];
 	bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
 	l234info = le32_to_cpu(desc->rx.l234_info);
+	ol_info = le32_to_cpu(desc->rx.ol_info);
 
 	/* Based on hw strategy, the tag offloaded will be stored at
 	 * ot_vlan_tag in two layer tag case, and stored at vlan_tag
@@ -2874,7 +2875,8 @@ static int hns3_handle_bdinfo(struct hns3_enet_ring *ring, struct sk_buff *skb)
 	skb->protocol = eth_type_trans(skb, netdev);
 
 	/* This is needed in order to enable forwarding support */
-	ret = hns3_set_gro_and_checksum(ring, skb, l234info, bd_base_info);
+	ret = hns3_set_gro_and_checksum(ring, skb, l234info,
+					bd_base_info, ol_info);
 	if (unlikely(ret)) {
 		u64_stats_update_begin(&ring->syncp);
 		ring->stats.rx_err_cnt++;