net: make ndo_get_stats64 a void function

The network device operation for reading statistics is only called
in one place, and it ignores the return value. Having a structure
return value is potentially confusing because some future driver could
incorrectly assume that the return value was used.

Fix all drivers with ndo_get_stats64 to have a void function.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/ec_bhf.c b/drivers/net/ethernet/ec_bhf.c
index 7bf78a0..278f139 100644
--- a/drivers/net/ethernet/ec_bhf.c
+++ b/drivers/net/ethernet/ec_bhf.c
@@ -457,7 +457,7 @@ static int ec_bhf_stop(struct net_device *net_dev)
 	return 0;
 }
 
-static struct rtnl_link_stats64 *
+static void
 ec_bhf_get_stats(struct net_device *net_dev,
 		 struct rtnl_link_stats64 *stats)
 {
@@ -472,8 +472,6 @@ ec_bhf_get_stats(struct net_device *net_dev,
 
 	stats->tx_bytes = priv->stat_tx_bytes;
 	stats->rx_bytes = priv->stat_rx_bytes;
-
-	return stats;
 }
 
 static const struct net_device_ops ec_bhf_netdev_ops = {