[IGMP]: Optimize kfree_skb in igmp_rcv.

Merge error paths inside igmp_rcv.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 7 deletions

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 994648be80ab..732cd07e6071 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -922,13 +922,11 @@ int igmp_rcv(struct sk_buff *skb)
         struct in_device *in_dev = in_dev_get(skb->dev);
         int len = skb->len;
 
-        if (in_dev==NULL) {
-                kfree_skb(skb);
-                return 0;
-        }
+        if (in_dev == NULL)
+                goto drop;
 
         if (!pskb_may_pull(skb, sizeof(struct igmphdr)))
-                goto drop;
+                goto drop_ref;
 
         switch (skb->ip_summed) {
         case CHECKSUM_COMPLETE:
@@ -938,7 +936,7 @@ int igmp_rcv(struct sk_buff *skb)
         case CHECKSUM_NONE:
                 skb->csum = 0;
                 if (__skb_checksum_complete(skb))
-                        goto drop;
+                        goto drop_ref;
         }
 
         ih = igmp_hdr(skb);
@@ -972,8 +970,9 @@ int igmp_rcv(struct sk_buff *skb)
                 break;
         }
 
-drop:
+drop_ref:
         in_dev_put(in_dev);
+drop:
         kfree_skb(skb);
         return 0;
 }