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team: fall back to hash if table entry is empty

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If the hash to port mapping table does not have a valid port (i.e. when
a port goes down), fall back to the simple hashing mechanism to avoid
dropping packets.

Signed-off-by: Jim Hanko <hanko@drivescale.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jim Hanko 2017-09-19 11:33:39 -07:00 committed by David S. Miller
parent d3b557712f
commit bd7d2106b6
1 changed files with 7 additions and 1 deletions
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8
drivers/net/team/team_mode_loadbalance.c
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@ -137,7 +137,13 @@ static struct team_port *lb_htpm_select_tx_port(struct team *team,
struct sk_buff *skb,
unsigned char hash)
{
return rcu_dereference_bh(LB_HTPM_PORT_BY_HASH(lb_priv, hash));
struct team_port *port;
port = rcu_dereference_bh(LB_HTPM_PORT_BY_HASH(lb_priv, hash));
if (likely(port))
return port;
/* If no valid port in the table, fall back to simple hash */
return lb_hash_select_tx_port(team, lb_priv, skb, hash);
}
struct lb_select_tx_port {