netdev - Re: [PATCH] greth: some driver cleanups

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Date:	Fri, 19 Feb 2010 13:04:26 +0100
From:	Jiri Pirko <jpirko@...hat.com>
To:	kirjanov@...il.com
Cc:	davem@...emloft.net, kristoffer@...sler.com, netdev@...r.kernel.org
Subject: Re: [PATCH] greth: some driver cleanups

Fri, Feb 19, 2010 at 12:14:39PM CET, kirjanov@...il.com wrote:
>Some driver cleanups:
>* convert to use phy_find_first/phy_direct_connect
>* convert to use netdev_mc_* helpers
>* fixed missing validate_addr hook
>* removed netdev_priv castings
>
>Signed-off-by: Denis Kirjanov <kirjanov@...il.com>
>
>---
> drivers/net/greth.c |   38 +++++++++++++++-----------------------
> 1 files changed, 15 insertions(+), 23 deletions(-)
>
>diff --git a/drivers/net/greth.c b/drivers/net/greth.c
>index 457da1c..38620da 100644
>--- a/drivers/net/greth.c
>+++ b/drivers/net/greth.c
>@@ -965,7 +965,7 @@ static int greth_set_mac_add(struct net_device *dev, void *p)
> 	struct greth_private *greth;
> 	struct greth_regs *regs;
> 
>-	greth = (struct greth_private *) netdev_priv(dev);
>+	greth = netdev_priv(dev);
> 	regs = (struct greth_regs *) greth->regs;
> 
> 	if (!is_valid_ether_addr(addr->sa_data))
>@@ -988,16 +988,14 @@ static u32 greth_hash_get_index(__u8 *addr)
> static void greth_set_hash_filter(struct net_device *dev)
> {
> 	struct dev_mc_list *curr;
>-	struct greth_private *greth = (struct greth_private *) netdev_priv(dev);
>+	struct greth_private *greth = netdev_priv(dev);
> 	struct greth_regs *regs = (struct greth_regs *) greth->regs;
> 	u32 mc_filter[2];
>-	unsigned int i, bitnr;
>+	unsigned int bitnr;
> 
> 	mc_filter[0] = mc_filter[1] = 0;
> 
>-	curr = dev->mc_list;
>-
>-	for (i = 0; i < dev->mc_count; i++, curr = curr->next) {
>+	netdev_for_each_mc_addr(curr, dev) {
> 

Please also remove following 2 lines:
> 		if (!curr)
> 			break;	/* unexpected end of list */
------------------------------------

>@@ -1031,7 +1029,7 @@ static void greth_set_multicast_list(struct net_device *dev)
> 			return;
> 		}
> 
>-		if (dev->mc_count == 0) {
>+		if (!netdev_mc_count(dev)) {
> 			cfg &= ~GRETH_CTRL_MCEN;
> 			GRETH_REGSAVE(regs->control, cfg);
> 			return;
>@@ -1160,6 +1158,7 @@ static struct net_device_ops greth_netdev_ops = {
> 	.ndo_stop = greth_close,
> 	.ndo_start_xmit = greth_start_xmit,
> 	.ndo_set_mac_address = greth_set_mac_add,
>+	.ndo_validate_addr 	= eth_validate_addr,
> };
> 
> static inline int wait_for_mdio(struct greth_private *greth)
>@@ -1275,28 +1274,21 @@ static int greth_mdio_probe(struct net_device *dev)
> {
> 	struct greth_private *greth = netdev_priv(dev);
> 	struct phy_device *phy = NULL;
>-	u32 interface;
>-	int i;
>+	int ret;
> 
> 	/* Find the first PHY */
>-	for (i = 0; i < PHY_MAX_ADDR; i++) {
>-		if (greth->mdio->phy_map[i]) {
>-			phy = greth->mdio->phy_map[i];
>-			break;
>-		}
>-	}
>+	phy = phy_find_first(greth->mdio);
>+
> 	if (!phy) {
> 		if (netif_msg_probe(greth))
> 			dev_err(&dev->dev, "no PHY found\n");
> 		return -ENXIO;
> 	}
> 
>-	if (greth->gbit_mac)
>-		interface = PHY_INTERFACE_MODE_GMII;
>-	else
>-		interface = PHY_INTERFACE_MODE_MII;
>-
>-	phy = phy_connect(dev, dev_name(&phy->dev), &greth_link_change, 0, interface);
>+	ret = phy_connect_direct(dev, phy, &greth_link_change,
>+			0, greth->gbit_mac ?
>+			PHY_INTERFACE_MODE_GMII :
>+			PHY_INTERFACE_MODE_MII);
> 
> 	if (greth->gbit_mac)
> 		phy->supported &= PHY_GBIT_FEATURES;
>@@ -1305,10 +1297,10 @@ static int greth_mdio_probe(struct net_device *dev)
> 
> 	phy->advertising = phy->supported;
> 

When you are in this, I would rather move return value checking right after
phy_connect_direct() call

Regards,
	Jirka

>-	if (IS_ERR(phy)) {
>+	if (ret) {
> 		if (netif_msg_ifup(greth))
> 			dev_err(&dev->dev, "could not attach to PHY\n");
>-		return PTR_ERR(phy);
>+		return ret;
> 	}
> 
> 	greth->link = 0;
--
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