cxgb3: use ndo_siocdevprivate

cxgb3 has a private multiplexor that works correctly in compat
mode, split out the siocdevprivate callback from do_ioctl for
simplification.

Cc: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c

@@ -2135,13 +2135,18 @@ static int in_range(int val, int lo, int hi)
 	return val < 0 || (val <= hi && val >= lo);
 }
 
-static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr)
+static int cxgb_siocdevprivate(struct net_device *dev,
+			       struct ifreq *ifreq,
+			       void __user *useraddr,
+			       int cmd)
 {
 	struct port_info *pi = netdev_priv(dev);
 	struct adapter *adapter = pi->adapter;
-	u32 cmd;
 	int ret;
 
+	if (cmd != SIOCCHIOCTL)
+		return -EOPNOTSUPP;
+
 	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 		return -EFAULT;
 
@@ -2546,8 +2551,6 @@ static int cxgb_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
 		fallthrough;
 	case SIOCGMIIPHY:
 		return mdio_mii_ioctl(&pi->phy.mdio, data, cmd);
-	case SIOCCHIOCTL:
-		return cxgb_extension_ioctl(dev, req->ifr_data);
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -3182,6 +3185,7 @@ static const struct net_device_ops cxgb_netdev_ops = {
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_rx_mode	= cxgb_set_rxmode,
 	.ndo_do_ioctl		= cxgb_ioctl,
+	.ndo_siocdevprivate	= cxgb_siocdevprivate,
 	.ndo_change_mtu		= cxgb_change_mtu,
 	.ndo_set_mac_address	= cxgb_set_mac_addr,
 	.ndo_fix_features	= cxgb_fix_features,