gro: Name the GRO result enumeration type

This clarifies which return and parameter types are GRO result codes
and not RX result codes.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 68a1bb6..1dc1374 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2476,7 +2476,7 @@
 }
 EXPORT_SYMBOL(napi_gro_flush);
 
-int dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
+enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 {
 	struct sk_buff **pp = NULL;
 	struct packet_type *ptype;
@@ -2484,7 +2484,7 @@
 	struct list_head *head = &ptype_base[ntohs(type) & PTYPE_HASH_MASK];
 	int same_flow;
 	int mac_len;
-	int ret;
+	enum gro_result ret;
 
 	if (!(skb->dev->features & NETIF_F_GRO))
 		goto normal;
@@ -2568,7 +2568,8 @@
 }
 EXPORT_SYMBOL(dev_gro_receive);
 
-static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
+static gro_result_t
+__napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 {
 	struct sk_buff *p;
 
@@ -2585,7 +2586,7 @@
 	return dev_gro_receive(napi, skb);
 }
 
-int napi_skb_finish(int ret, struct sk_buff *skb)
+int napi_skb_finish(gro_result_t ret, struct sk_buff *skb)
 {
 	int err = NET_RX_SUCCESS;
 
@@ -2600,6 +2601,10 @@
 	case GRO_MERGED_FREE:
 		kfree_skb(skb);
 		break;
+
+	case GRO_HELD:
+	case GRO_MERGED:
+		break;
 	}
 
 	return err;
@@ -2652,7 +2657,8 @@
 }
 EXPORT_SYMBOL(napi_get_frags);
 
-int napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb, int ret)
+int napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb,
+		      gro_result_t ret)
 {
 	int err = NET_RX_SUCCESS;
 
@@ -2674,6 +2680,9 @@
 	case GRO_MERGED_FREE:
 		napi_reuse_skb(napi, skb);
 		break;
+
+	case GRO_MERGED:
+		break;
 	}
 
 	return err;