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/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index d5d1026..de1d07c 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -6821,13 +6821,13 @@ bnx2_save_stats(struct bnx2 *bp)
 	(unsigned long) (bp->stats_blk->ctr +			\
 			 bp->temp_stats_blk->ctr)
 
-static struct rtnl_link_stats64 *
+static void
 bnx2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *net_stats)
 {
 	struct bnx2 *bp = netdev_priv(dev);
 
 	if (bp->stats_blk == NULL)
-		return net_stats;
+		return;
 
 	net_stats->rx_packets =
 		GET_64BIT_NET_STATS(stat_IfHCInUcastPkts) +
@@ -6891,7 +6891,6 @@ bnx2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *net_stats)
 		GET_32BIT_NET_STATS(stat_IfInMBUFDiscards) +
 		GET_32BIT_NET_STATS(stat_FwRxDrop);
 
-	return net_stats;
 }
 
 /* All ethtool functions called with rtnl_lock */