team: lb: push hash counting into separate function

Also squash hash into one byte

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 7 deletions

diff --git a/drivers/net/team/team_mode_loadbalance.c b/drivers/net/team/team_mode_loadbalance.c
index 6452428a1d6c..a475b1304f9a 100644
--- a/drivers/net/team/team_mode_loadbalance.c
+++ b/drivers/net/team/team_mode_loadbalance.c
@@ -27,18 +27,27 @@ static struct lb_priv *lb_priv(struct team *team)
         return (struct lb_priv *) &team->mode_priv;
 }
 
-static bool lb_transmit(struct team *team, struct sk_buff *skb)
+static unsigned char lb_get_skb_hash(struct lb_priv *lb_priv,
+                                     struct sk_buff *skb)
 {
         struct sk_filter *fp;
+        uint32_t lhash;
+        unsigned char *c;
+
+        fp = rcu_dereference(lb_priv->fp);
+        if (unlikely(!fp))
+                return 0;
+        lhash = SK_RUN_FILTER(fp, skb);
+        c = (char *) &lhash;
+        return c[0] ^ c[1] ^ c[2] ^ c[3];
+}
+
+static bool lb_transmit(struct team *team, struct sk_buff *skb)
+{
         struct team_port *port;
-        unsigned int hash;
         int port_index;
 
-        fp = rcu_dereference(lb_priv(team)->fp);
-        if (unlikely(!fp))
-                goto drop;
-        hash = SK_RUN_FILTER(fp, skb);
-        port_index = hash % team->en_port_count;
+        port_index = lb_get_skb_hash(lb_priv(team), skb) % team->en_port_count;
         port = team_get_port_by_index_rcu(team, port_index);
         if (unlikely(!port))
                 goto drop;