[PATCH] gre: fix return value of gre_rcv

[Haishuang Yan]

Dropped skb's should be documented by an appropriate return value.
Use the correct NET_RX_DROP and NET_RX_SUCCESS values for that reason.

Signed-off-by: Haishuang Yan <yanhaishu...@cmss.chinamobile.com>
---
 net/ipv4/ip_gre.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 31936d3..1dc0cdb 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -432,12 +432,12 @@ static int gre_rcv(struct sk_buff *skb)
                goto drop;
 
        if (ipgre_rcv(skb, &tpi) == PACKET_RCVD)
-               return 0;
+               return NET_RX_SUCCESS;
 
        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
 drop:
        kfree_skb(skb);
-       return 0;
+       return NET_RX_DROP;
 }
 
 static __sum16 gre_checksum(struct sk_buff *skb)
-- 
1.8.3.1