team: do not allow to map disabled ports

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

drivers/net/team/team.c

@@ -614,8 +614,6 @@ static int team_change_mode(struct team *team, const char *kind)
  * Rx path frame handler
  ************************/
 
-static bool team_port_enabled(struct team_port *port);
-
 /* note: already called with rcu_read_lock */
 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 {
@@ -673,10 +671,11 @@ static bool team_port_find(const struct team *team,
 	return false;
 }
 
-static bool team_port_enabled(struct team_port *port)
+bool team_port_enabled(struct team_port *port)
 {
 	return port->index != -1;
 }
+EXPORT_SYMBOL(team_port_enabled);
 
 /*
  * Enable/disable port by adding to enabled port hashlist and setting

drivers/net/team/team_mode_loadbalance.c

@@ -359,7 +359,8 @@ static int lb_tx_hash_to_port_mapping_set(struct team *team,
 	unsigned char hash = ctx->info->array_index;
 
 	list_for_each_entry(port, &team->port_list, list) {
-		if (ctx->data.u32_val == port->dev->ifindex) {
+		if (ctx->data.u32_val == port->dev->ifindex &&
+		    team_port_enabled(port)) {
 			rcu_assign_pointer(LB_HTPM_PORT_BY_HASH(lb_priv, hash),
 					   port);
 			return 0;

include/linux/if_team.h

@@ -64,6 +64,8 @@ struct team_port {
 	long mode_priv[0];
 };
 
+extern bool team_port_enabled(struct team_port *port);
+
 struct team_mode_ops {
 	int (*init)(struct team *team);
 	void (*exit)(struct team *team);