From: Yunsheng Lin <linyunsheng@huawei.com>
Date: Mon, 6 May 2019 10:48:45 +0800
Subject: net: hns3: fix for tunnel type handling in hns3_rx_checksum
Patch-mainline: v5.2-rc1
Git-commit: 39c38824c2a0b16bdc6450727847fd5c3da7e8b0
References: bsc#1104353 FATE#326415 bsc#1134946

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: 76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2464,7 +2464,7 @@ static int hns3_gro_complete(struct sk_b
 }
 
 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;
@@ -2491,7 +2491,7 @@ static void hns3_rx_checksum(struct hns3
 		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:
@@ -2695,7 +2695,7 @@ static int hns3_add_frag(struct hns3_ene
 
 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;
@@ -2704,7 +2704,7 @@ static int hns3_set_gro_and_checksum(str
 				    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;
 	}
 
@@ -2744,7 +2744,7 @@ static int hns3_handle_bdinfo(struct hns
 {
 	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;
@@ -2758,6 +2758,7 @@ static int hns3_handle_bdinfo(struct hns
 	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
@@ -2797,7 +2798,8 @@ static int hns3_handle_bdinfo(struct hns
 	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++;