[net-next] arp: correct return value of arp_rcv

[Zhang Shengju]

Currently, arp_rcv() always return zero on a packet delivery upcall.

To make its behavior more compliant with the way this API should be
used, this patch changes this to let it return NET_RX_SUCCESS when the
packet is proper handled, and NET_RX_DROP otherwise.

Signed-off-by: Zhang Shengju <zhangshen...@cmss.chinamobile.com>
---
 net/ipv4/arp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index c102eb5..ae235a1 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -880,7 +880,7 @@ out:
        consume_skb(skb);
 out_free_dst:
        dst_release(reply_dst);
-       return 0;
+       return NET_RX_SUCCESS;
 }
 
 static void parp_redo(struct sk_buff *skb)
@@ -924,11 +924,11 @@ static int arp_rcv(struct sk_buff *skb, struct net_device 
*dev,
 
 consumeskb:
        consume_skb(skb);
-       return 0;
+       return NET_RX_SUCCESS;
 freeskb:
        kfree_skb(skb);
 out_of_mem:
-       return 0;
+       return NET_RX_DROP;
 }
 
 /*
-- 
1.8.3.1