net/ethtool/ioctl: remove if n_stats checks from ethtool_get_phy_stats

Now that we always early return if we don't have any stats we can remove
these checks as they're no longer necessary.
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ethtool/ioctl.c

@@ -2107,28 +2107,24 @@ static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
 
 	stats.n_stats = n_stats;
 
-	if (n_stats) {
-		data = vzalloc(array_size(n_stats, sizeof(u64)));
-		if (!data)
-			return -ENOMEM;
+	data = vzalloc(array_size(n_stats, sizeof(u64)));
+	if (!data)
+		return -ENOMEM;
 
-		if (phydev && !ops->get_ethtool_phy_stats &&
-		    phy_ops && phy_ops->get_stats) {
-			ret = phy_ops->get_stats(phydev, &stats, data);
-			if (ret < 0)
-				goto out;
-		} else {
-			ops->get_ethtool_phy_stats(dev, &stats, data);
-		}
+	if (phydev && !ops->get_ethtool_phy_stats &&
+		phy_ops && phy_ops->get_stats) {
+		ret = phy_ops->get_stats(phydev, &stats, data);
+		if (ret < 0)
+			goto out;
 	} else {
-		data = NULL;
+		ops->get_ethtool_phy_stats(dev, &stats, data);
 	}
 
 	ret = -EFAULT;
 	if (copy_to_user(useraddr, &stats, sizeof(stats)))
 		goto out;
 	useraddr += sizeof(stats);
-	if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
+	if (copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
 		goto out;
 	ret = 0;