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: NBen Hutchings <bhutchings@solarflare.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/netdevice.h

@@ -348,13 +348,14 @@ enum
 	NAPI_STATE_NPSVC,	/* Netpoll - don't dequeue from poll_list */
 };
 
-enum {
+enum gro_result {
 	GRO_MERGED,
 	GRO_MERGED_FREE,
 	GRO_HELD,
 	GRO_NORMAL,
 	GRO_DROP,
 };
+typedef enum gro_result gro_result_t;
 
 extern void __napi_schedule(struct napi_struct *n);
 
@@ -1480,16 +1481,17 @@ extern int		netif_rx_ni(struct sk_buff *skb);
 #define HAVE_NETIF_RECEIVE_SKB 1
 extern int		netif_receive_skb(struct sk_buff *skb);
 extern void		napi_gro_flush(struct napi_struct *napi);
-extern int		dev_gro_receive(struct napi_struct *napi,
+extern gro_result_t	dev_gro_receive(struct napi_struct *napi,
 					struct sk_buff *skb);
-extern int		napi_skb_finish(int ret, struct sk_buff *skb);
+extern int		napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
 extern int		napi_gro_receive(struct napi_struct *napi,
 					 struct sk_buff *skb);
 extern void		napi_reuse_skb(struct napi_struct *napi,
 				       struct sk_buff *skb);
 extern struct sk_buff *	napi_get_frags(struct napi_struct *napi);
 extern int		napi_frags_finish(struct napi_struct *napi,
-					  struct sk_buff *skb, int ret);
+					  struct sk_buff *skb,
+					  gro_result_t ret);
 extern struct sk_buff *	napi_frags_skb(struct napi_struct *napi);
 extern int		napi_gro_frags(struct napi_struct *napi);
 

net/8021q/vlan_core.c

@@ -74,7 +74,8 @@ u16 vlan_dev_vlan_id(const struct net_device *dev)
 }
 EXPORT_SYMBOL(vlan_dev_vlan_id);
 
-static int vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
+static gro_result_t
+vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
 		unsigned int vlan_tci, struct sk_buff *skb)
 {
 	struct sk_buff *p;

net/core/dev.c

@@ -2476,7 +2476,7 @@ void napi_gro_flush(struct napi_struct *napi)
 }
 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 @@ int dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 	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 @@ int dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 }
 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 @@ static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 	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 @@ int napi_skb_finish(int ret, struct sk_buff *skb)
 	case GRO_MERGED_FREE:
 		kfree_skb(skb);
 		break;
+
+	case GRO_HELD:
+	case GRO_MERGED:
+		break;
 	}
 
 	return err;
@@ -2652,7 +2657,8 @@ struct sk_buff *napi_get_frags(struct napi_struct *napi)
 }
 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 @@ int napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb, int ret)
 	case GRO_MERGED_FREE:
 		napi_reuse_skb(napi, skb);
 		break;
+
+	case GRO_MERGED:
+		break;
 	}
 
 	return err;