1 files changed, 14 insertions, 59 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index cb8caa93caca..e61b95c11fc0 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1708,72 +1708,27 @@ out_kfree_skb:
 	return 0;
 }
 
-static u32 simple_tx_hashrnd;
-static int simple_tx_hashrnd_initialized = 0;
+static u32 skb_tx_hashrnd;
+static int skb_tx_hashrnd_initialized = 0;
 
-static u16 simple_tx_hash(struct net_device *dev, struct sk_buff *skb)
+static u16 skb_tx_hash(struct net_device *dev, struct sk_buff *skb)
 {
-	u32 addr1, addr2, ports;
-	u32 hash, ihl;
-	u8 ip_proto = 0;
+	u32 hash;
 
-	if (unlikely(!simple_tx_hashrnd_initialized)) {
-		get_random_bytes(&simple_tx_hashrnd, 4);
-		simple_tx_hashrnd_initialized = 1;
+	if (unlikely(!skb_tx_hashrnd_initialized)) {
+		get_random_bytes(&skb_tx_hashrnd, 4);
+		skb_tx_hashrnd_initialized = 1;
 	}
 
 	if (skb_rx_queue_recorded(skb)) {
-		u32 val = skb_get_rx_queue(skb);
-
-		hash = jhash_1word(val, simple_tx_hashrnd);
-		goto out;
-	}
-
-	if (skb->sk && skb->sk->sk_hash) {
-		u32 val = skb->sk->sk_hash;
-
-		hash = jhash_1word(val, simple_tx_hashrnd);
-		goto out;
-	}
-
-	switch (skb->protocol) {
-	case htons(ETH_P_IP):
-		if (!(ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)))
-			ip_proto = ip_hdr(skb)->protocol;
-		addr1 = ip_hdr(skb)->saddr;
-		addr2 = ip_hdr(skb)->daddr;
-		ihl = ip_hdr(skb)->ihl;
-		break;
-	case htons(ETH_P_IPV6):
-		ip_proto = ipv6_hdr(skb)->nexthdr;
-		addr1 = ipv6_hdr(skb)->saddr.s6_addr32[3];
-		addr2 = ipv6_hdr(skb)->daddr.s6_addr32[3];
-		ihl = (40 >> 2);
-		break;
-	default:
-		return 0;
-	}
-
-
-	switch (ip_proto) {
-	case IPPROTO_TCP:
-	case IPPROTO_UDP:
-	case IPPROTO_DCCP:
-	case IPPROTO_ESP:
-	case IPPROTO_AH:
-	case IPPROTO_SCTP:
-	case IPPROTO_UDPLITE:
-		ports = *((u32 *) (skb_network_header(skb) + (ihl * 4)));
-		break;
-
-	default:
-		ports = 0;
-		break;
-	}
+		hash = skb_get_rx_queue(skb);
+	} else if (skb->sk && skb->sk->sk_hash) {
+		hash = skb->sk->sk_hash;
+	} else
+		hash = skb->protocol;
 
-	hash = jhash_3words(addr1, addr2, ports, simple_tx_hashrnd);
+	hash = jhash_1word(hash, skb_tx_hashrnd);
 
-out:
 	return (u16) (((u64) hash * dev->real_num_tx_queues) >> 32);
 }
 
@@ -1786,7 +1741,7 @@ static struct netdev_queue *dev_pick_tx(struct net_device *dev,
 	if (ops->ndo_select_queue)
 		queue_index = ops->ndo_select_queue(dev, skb);
 	else if (dev->real_num_tx_queues > 1)
-		queue_index = simple_tx_hash(dev, skb);
+		queue_index = skb_tx_hash(dev, skb);
 
 	skb_set_queue_mapping(skb, queue_index);
 	return netdev_get_tx_queue(dev, queue_index);