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Date: Fri, 30 Aug 2013 01:06:44 +0200
From: Francois Romieu <romieu@...zoreil.com>
To: liujunliang_ljl@....com
Cc: davem@...emloft.net, horms@...ge.net.au, joe@...ches.com,
gregkh@...uxfoundation.org, netdev@...r.kernel.org,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
sunhecheng@....126.com
Subject: Re: [PATCH] USB2NET : SR9700 : One Chip USB 1.1 USB2NET SR9700
Device Driver Support
- use all columns
- the driver uses both 'netdev' and 'net'. Let's use 'netdev' ('net' is
shorter but it tastes of network namespaces)
- don't dereference dev->net when there is a local netdev at hand
- use some existing #define (please check those)
- skb_set_tail_pointer to avoid compiler cast warnings
Pick whatever you want. skb_set_tail_pointer if nothing else.
---
drivers/net/usb/sr9700.c | 113 +++++++++++++++++++++++++----------------------
1 file changed, 60 insertions(+), 53 deletions(-)
diff --git a/drivers/net/usb/sr9700.c b/drivers/net/usb/sr9700.c
index 76e11f5..f7f46e6 100644
--- a/drivers/net/usb/sr9700.c
+++ b/drivers/net/usb/sr9700.c
@@ -28,8 +28,8 @@ static int sr_read(struct usbnet *dev, u8 reg, u16 length, void *data)
{
int err;
- err = usbnet_read_cmd(dev, SR_RD_REGS, SR_REQ_RD_REG,
- 0, reg, data, length);
+ err = usbnet_read_cmd(dev, SR_RD_REGS, SR_REQ_RD_REG, 0, reg, data,
+ length);
if ((err != length) && (err >= 0))
err = -EINVAL;
return err;
@@ -39,8 +39,8 @@ static int sr_write(struct usbnet *dev, u8 reg, u16 length, void *data)
{
int err;
- err = usbnet_write_cmd(dev, SR_WR_REGS, SR_REQ_WR_REG,
- 0, reg, data, length);
+ err = usbnet_write_cmd(dev, SR_WR_REGS, SR_REQ_WR_REG, 0, reg, data,
+ length);
if ((err >= 0) && (err < length))
err = -EINVAL;
return err;
@@ -158,11 +158,11 @@ static int sr9700_get_eeprom_len(struct net_device *dev)
return SR_EEPROM_LEN;
}
-static int sr9700_get_eeprom(struct net_device *net,
+static int sr9700_get_eeprom(struct net_device *netdev,
struct ethtool_eeprom *eeprom, u8 *data)
{
- struct usbnet *dev = netdev_priv(net);
- __le16 *ebuf = (__le16 *)data;
+ struct usbnet *dev = netdev_priv(netdev);
+ __le16 *buf = (__le16 *)data;
int ret = 0;
int i;
@@ -170,9 +170,11 @@ static int sr9700_get_eeprom(struct net_device *net,
if ((eeprom->offset & 0x01) || (eeprom->len & 0x01))
return -EINVAL;
- for (i = 0; i < eeprom->len / 2; i++)
- ret = sr_read_eeprom_word(dev, eeprom->offset / 2 + i,
- &ebuf[i]);
+ for (i = 0; i < eeprom->len / 2; i++) {
+ ret = sr_read_eeprom_word(dev, eeprom->offset / 2 + i, buf + i);
+ if (ret < 0)
+ break;
+ }
return ret;
}
@@ -184,7 +186,7 @@ static int sr_mdio_read(struct net_device *netdev, int phy_id, int loc)
int rc = 0;
if (phy_id) {
- netdev_dbg(dev->net, "Only internal phy supported\n");
+ netdev_dbg(netdev, "Only internal phy supported\n");
return 0;
}
@@ -202,7 +204,7 @@ static int sr_mdio_read(struct net_device *netdev, int phy_id, int loc)
else
res = le16_to_cpu(res) & ~BMSR_LSTATUS;
- netdev_dbg(dev->net, "sr_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
+ netdev_dbg(netdev, "sr_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
phy_id, loc, res);
return res;
@@ -215,19 +217,19 @@ static void sr_mdio_write(struct net_device *netdev, int phy_id, int loc,
__le16 res = cpu_to_le16(val);
if (phy_id) {
- netdev_dbg(dev->net, "Only internal phy supported\n");
+ netdev_dbg(netdev, "Only internal phy supported\n");
return;
}
- netdev_dbg(dev->net, "sr_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
+ netdev_dbg(netdev, "sr_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
phy_id, loc, val);
sr_share_write_word(dev, 1, loc, res);
}
-static u32 sr9700_get_link(struct net_device *net)
+static u32 sr9700_get_link(struct net_device *netdev)
{
- struct usbnet *dev = netdev_priv(net);
+ struct usbnet *dev = netdev_priv(netdev);
u8 value = 0;
int rc = 0;
@@ -239,9 +241,9 @@ static u32 sr9700_get_link(struct net_device *net)
return rc;
}
-static int sr9700_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
+static int sr9700_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
{
- struct usbnet *dev = netdev_priv(net);
+ struct usbnet *dev = netdev_priv(netdev);
return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
}
@@ -258,9 +260,9 @@ static const struct ethtool_ops sr9700_ethtool_ops = {
.nway_reset = usbnet_nway_reset,
};
-static void sr9700_set_multicast(struct net_device *net)
+static void sr9700_set_multicast(struct net_device *netdev)
{
- struct usbnet *dev = netdev_priv(net);
+ struct usbnet *dev = netdev_priv(netdev);
/* We use the 20 byte dev->data for our 8 byte filter buffer
* to avoid allocating memory that is tricky to free later
*/
@@ -271,14 +273,15 @@ static void sr9700_set_multicast(struct net_device *net)
memset(hashes, 0x00, SR_MCAST_SIZE);
/* broadcast address */
hashes[SR_MCAST_SIZE - 1] |= SR_MCAST_ADDR_FLAG;
- if (net->flags & IFF_PROMISC) {
+ if (netdev->flags & IFF_PROMISC) {
rx_ctl |= RCR_PRMSC;
- } else if (net->flags & IFF_ALLMULTI ||
- netdev_mc_count(net) > SR_MCAST_MAX) {
+ } else if (netdev->flags & IFF_ALLMULTI ||
+ netdev_mc_count(netdev) > SR_MCAST_MAX) {
rx_ctl |= RCR_RUNT;
- } else if (!netdev_mc_empty(net)) {
+ } else if (!netdev_mc_empty(netdev)) {
struct netdev_hw_addr *ha;
- netdev_for_each_mc_addr(ha, net) {
+
+ netdev_for_each_mc_addr(ha, netdev) {
u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
hashes[crc >> 3] |= 1 << (crc & 0x7);
}
@@ -288,19 +291,19 @@ static void sr9700_set_multicast(struct net_device *net)
sr_write_reg_async(dev, RCR, rx_ctl);
}
-static int sr9700_set_mac_address(struct net_device *net, void *p)
+static int sr9700_set_mac_address(struct net_device *netdev, void *p)
{
- struct usbnet *dev = netdev_priv(net);
+ struct usbnet *dev = netdev_priv(netdev);
struct sockaddr *addr = p;
if (!is_valid_ether_addr(addr->sa_data)) {
- netdev_err(net, "not setting invalid mac address %pM\n",
+ netdev_err(netdev, "not setting invalid mac address %pM\n",
addr->sa_data);
return -EINVAL;
}
- memcpy(net->dev_addr, addr->sa_data, net->addr_len);
- sr_write_async(dev, PAR, 6, dev->net->dev_addr);
+ memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+ sr_write_async(dev, PAR, 6, netdev->dev_addr);
return 0;
}
@@ -319,26 +322,31 @@ static const struct net_device_ops sr9700_netdev_ops = {
static int sr9700_bind(struct usbnet *dev, struct usb_interface *intf)
{
+ struct net_device *netdev;
+ struct mii_if_info *mii;
int ret;
ret = usbnet_get_endpoints(dev, intf);
if (ret)
goto out;
- dev->net->netdev_ops = &sr9700_netdev_ops;
- dev->net->ethtool_ops = &sr9700_ethtool_ops;
- dev->net->hard_header_len += SR_TX_OVERHEAD;
- dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
+ netdev = dev->net;
+
+ netdev->netdev_ops = &sr9700_netdev_ops;
+ netdev->ethtool_ops = &sr9700_ethtool_ops;
+ netdev->hard_header_len += SR_TX_OVERHEAD;
+ dev->hard_mtu = netdev->mtu + netdev->hard_header_len;
/* bulkin buffer is preferably not less than 3K */
dev->rx_urb_size = 3072;
- dev->mii.dev = dev->net;
- dev->mii.mdio_read = sr_mdio_read;
- dev->mii.mdio_write = sr_mdio_write;
- dev->mii.phy_id_mask = 0x1f;
- dev->mii.reg_num_mask = 0x1f;
-
- /* reset the sr9700 */
- sr_write_reg(dev, NCR, 1);
+
+ mii = &dev->mii;
+ mii->dev = netdev;
+ mii->mdio_read = sr_mdio_read;
+ mii->mdio_write = sr_mdio_write;
+ mii->phy_id_mask = 0x1f;
+ mii->reg_num_mask = 0x1f;
+
+ sr_write_reg(dev, NCR, NCR_RST);
udelay(20);
/* read MAC
@@ -346,14 +354,14 @@ static int sr9700_bind(struct usbnet *dev, struct usb_interface *intf)
* EEPROM automatically to PAR. In case there is no EEPROM externally,
* a default MAC address is stored in PAR for making chip work properly.
*/
- if (sr_read(dev, PAR, ETH_ALEN, dev->net->dev_addr) < 0) {
- netdev_err(dev->net, "Error reading MAC address\n");
+ if (sr_read(dev, PAR, ETH_ALEN, netdev->dev_addr) < 0) {
+ netdev_err(netdev, "Error reading MAC address\n");
ret = -ENODEV;
goto out;
}
/* power up and reset phy */
- sr_write_reg(dev, PRR, 1);
+ sr_write_reg(dev, PRR, PRR_PHY_RST);
/* at least 10ms, here 20ms for safe */
mdelay(20);
sr_write_reg(dev, PRR, 0);
@@ -361,13 +369,12 @@ static int sr9700_bind(struct usbnet *dev, struct usb_interface *intf)
udelay(2 * 1000);
/* receive broadcast packets */
- sr9700_set_multicast(dev->net);
+ sr9700_set_multicast(netdev);
- sr_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
- sr_mdio_write(dev->net, dev->mii.phy_id,
- (MII_ADVERTISE, ADVERTISE_ALL |
- ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP));
- mii_nway_restart(&dev->mii);
+ sr_mdio_write(netdev, mii->phy_id, MII_BMCR, BMCR_RESET);
+ sr_mdio_write(netdev, mii->phy_id, MII_ADVERTISE, ADVERTISE_ALL |
+ ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
+ mii_nway_restart(mii);
out:
return ret;
@@ -415,7 +422,7 @@ static int sr9700_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
if (skb->len == (len + SR_RX_OVERHEAD)) {
skb_pull(skb, 3);
skb->len = len;
- skb->tail = skb->data + len;
+ skb_set_tail_pointer(skb, len);
skb->truesize = len + sizeof(struct sk_buff);
return 2;
}
@@ -427,7 +434,7 @@ static int sr9700_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
sr_skb->len = len;
sr_skb->data = skb->data + 3;
- sr_skb->tail = skb->data + len;
+ skb_set_tail_pointer(sr_skb, len - 3);
sr_skb->truesize = len + sizeof(struct sk_buff);
usbnet_skb_return(dev, sr_skb);
--
1.8.3.1
--
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