netdev - [PATCH net] ibmvnic: Fix IPv6 packet descriptors

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Date:   Thu, 18 Jan 2018 19:05:02 -0600
From:   Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
To:     netdev@...r.kernel.org
Cc:     jallen@...ux.vnet.ibm.com, nfont@...ux.vnet.ibm.com,
        Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
Subject: [PATCH net] ibmvnic: Fix IPv6 packet descriptors

Packet descriptor generation for IPv6 is broken.
Properly set L3 and L4 protocol flags for IPv6 descriptors.

Signed-off-by: Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 3700bfa..4bb41cd 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1281,6 +1281,7 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 	u64 *handle_array;
 	int index = 0;
 	int ret = 0;
+	u8 proto = 0;
 
 	if (adapter->resetting) {
 		if (!netif_subqueue_stopped(netdev, skb))
@@ -1367,18 +1368,19 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 		tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 	}
 
-	if (skb->protocol == htons(ETH_P_IP)) {
-		if (ip_hdr(skb)->version == 4)
-			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
-		else if (ip_hdr(skb)->version == 6)
-			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
-
-		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
-			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
-		else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
-			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
+        if (skb->protocol == htons(ETH_P_IP)) {
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
+		proto = ip_hdr(skb)->protocol;
+	} else if (skb->protocol == htons(ETH_P_IPV6)) {
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
+		proto = ipv6_hdr(skb)->nexthdr;
 	}
 
+	if (proto == IPPROTO_TCP)
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
+	else if (proto == IPPROTO_UDP)
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
+
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
 		tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 		hdrs += 2;
-- 
1.8.3.1