[NET]: Treat CHECKSUM_PARTIAL as CHECKSUM_UNNECESSARY

When a transmitted packet is looped back directly, CHECKSUM_PARTIAL
maps to the semantics of CHECKSUM_UNNECESSARY.  Therefore we should
treat it as such in the stack.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c
index 62cfbed317bf..f005a2f929f4 100644
--- a/net/ipv4/ipvs/ip_vs_core.c
+++ b/net/ipv4/ipvs/ip_vs_core.c
@@ -681,8 +681,7 @@ static int ip_vs_out_icmp(struct sk_buff **pskb, int *related)
         }
 
         /* Ensure the checksum is correct */
-        if (skb->ip_summed != CHECKSUM_UNNECESSARY &&
-            ip_vs_checksum_complete(skb, ihl)) {
+        if (!skb_csum_unnecessary(skb) && ip_vs_checksum_complete(skb, ihl)) {
                 /* Failed checksum! */
                 IP_VS_DBG(1, "Forward ICMP: failed checksum from %d.%d.%d.%d!\n",
                           NIPQUAD(iph->saddr));
@@ -921,8 +920,7 @@ ip_vs_in_icmp(struct sk_buff **pskb, int *related, unsigned int hooknum)
         verdict = NF_DROP;
 
         /* Ensure the checksum is correct */
-        if (skb->ip_summed != CHECKSUM_UNNECESSARY &&
-            ip_vs_checksum_complete(skb, ihl)) {
+        if (!skb_csum_unnecessary(skb) && ip_vs_checksum_complete(skb, ihl)) {
                 /* Failed checksum! */
                 IP_VS_DBG(1, "Incoming ICMP: failed checksum from %d.%d.%d.%d!\n",
                           NIPQUAD(iph->saddr));