net: gianfar: convert to hw_features

Note: I bet that gfar_set_features() don't really need a full reset.

Signed-off-by: Michał Mirosław <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/gianfar.c

···
 		gfar_write(&regs->rir0, DEFAULT_RIR0);
 	}
 
-	if (priv->rx_csum_enable)
+	if (ndev->features & NETIF_F_RXCSUM)
 		rctrl |= RCTRL_CHECKSUMMING;
 
 	if (priv->extended_hash) {
···
 	.ndo_start_xmit = gfar_start_xmit,
 	.ndo_stop = gfar_close,
 	.ndo_change_mtu = gfar_change_mtu,
+	.ndo_set_features = gfar_set_features,
 	.ndo_set_multicast_list = gfar_set_multi,
 	.ndo_tx_timeout = gfar_timeout,
 	.ndo_do_ioctl = gfar_ioctl,
···
 /* Returns 1 if incoming frames use an FCB */
 static inline int gfar_uses_fcb(struct gfar_private *priv)
 {
-	return priv->vlgrp || priv->rx_csum_enable ||
+	return priv->vlgrp || (priv->ndev->features & NETIF_F_RXCSUM) ||
 		(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER);
 }
 
···
 		netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll, GFAR_DEV_WEIGHT);
 
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
-		priv->rx_csum_enable = 1;
-		dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA;
-	} else
-		priv->rx_csum_enable = 0;
+		dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG |
+			NETIF_F_RXCSUM;
+		dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG |
+			NETIF_F_RXCSUM | NETIF_F_HIGHDMA;
+	}
 
 	priv->vlgrp = NULL;
 
···
 	if (priv->padding)
 		skb_pull(skb, priv->padding);
 
-	if (priv->rx_csum_enable)
+	if (dev->features & NETIF_F_RXCSUM)
 		gfar_rx_checksum(skb, fcb);
 
 	/* Tell the skb what kind of packet this is */

drivers/net/gianfar.h

···
 	struct device_node *phy_node;
 	struct device_node *tbi_node;
 	u32 device_flags;
-	unsigned char rx_csum_enable:1,
+	unsigned char
 		extended_hash:1,
 		bd_stash_en:1,
 		rx_filer_enable:1,
···
 extern void gfar_configure_coalescing(struct gfar_private *priv,
 		unsigned long tx_mask, unsigned long rx_mask);
 void gfar_init_sysfs(struct net_device *dev);
+int gfar_set_features(struct net_device *dev, u32 features);
 
 extern const struct ethtool_ops gfar_ethtool_ops;
 

drivers/net/gianfar_ethtool.c

···
 	return err;
 }
 
-static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
+int gfar_set_features(struct net_device *dev, u32 features)
 {
 	struct gfar_private *priv = netdev_priv(dev);
 	unsigned long flags;
 	int err = 0, i = 0;
+	u32 changed = dev->features ^ features;
 
-	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
-		return -EOPNOTSUPP;
-
+	if (!(changed & NETIF_F_RXCSUM))
+		return 0;
 
 	if (dev->flags & IFF_UP) {
 		/* Halt TX and RX, and process the frames which
···
 
 		/* Now we take down the rings to rebuild them */
 		stop_gfar(dev);
-	}
 
-	spin_lock_irqsave(&priv->bflock, flags);
-	priv->rx_csum_enable = data;
-	spin_unlock_irqrestore(&priv->bflock, flags);
+		dev->features = features;
 
-	if (dev->flags & IFF_UP) {
 		err = startup_gfar(dev);
 		netif_tx_wake_all_queues(dev);
 	}
 	return err;
-}
-
-static uint32_t gfar_get_rx_csum(struct net_device *dev)
-{
-	struct gfar_private *priv = netdev_priv(dev);
-
-	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
-		return 0;
-
-	return priv->rx_csum_enable;
-}
-
-static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
-{
-	struct gfar_private *priv = netdev_priv(dev);
-
-	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
-		return -EOPNOTSUPP;
-
-	netif_tx_lock_bh(dev);
-
-	if (data)
-		dev->features |= NETIF_F_IP_CSUM;
-	else
-		dev->features &= ~NETIF_F_IP_CSUM;
-
-	netif_tx_unlock_bh(dev);
-
-	return 0;
-}
-
-static uint32_t gfar_get_tx_csum(struct net_device *dev)
-{
-	struct gfar_private *priv = netdev_priv(dev);
-
-	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
-		return 0;
-
-	return (dev->features & NETIF_F_IP_CSUM) != 0;
 }
 
 static uint32_t gfar_get_msglevel(struct net_device *dev)
···
 	.get_strings = gfar_gstrings,
 	.get_sset_count = gfar_sset_count,
 	.get_ethtool_stats = gfar_fill_stats,
-	.get_rx_csum = gfar_get_rx_csum,
-	.get_tx_csum = gfar_get_tx_csum,
-	.set_rx_csum = gfar_set_rx_csum,
-	.set_tx_csum = gfar_set_tx_csum,
-	.set_sg = ethtool_op_set_sg,
 	.get_msglevel = gfar_get_msglevel,
 	.set_msglevel = gfar_set_msglevel,
 #ifdef CONFIG_PM