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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-10-12 06:00:26 +0000
committerDavid S. Miller <davem@davemloft.net>2009-10-12 23:54:01 -0700
commitccc05c6e1e4fb672c93c98d92079c89a976e80ba (patch)
treef687178656c4d0b42f45a5b1648569c650c5617e
parenta2e2725541fad72416326798c2d7fa4dafb7d337 (diff)
downloadop-kernel-dev-ccc05c6e1e4fb672c93c98d92079c89a976e80ba.zip
op-kernel-dev-ccc05c6e1e4fb672c93c98d92079c89a976e80ba.tar.gz
gianfar: Some cleanups for startup_gfar()
We're going to split the startup_gfar() into 3 separate functions, so let's cleanup the code a little bit so that cosmetic changes won't distract attention from logical ones. - Remove needless casts (e.g. (struct sk_buff **)kmalloc()); - Turn 'unsigned long vaddr;' into 'void *vaddr', to avoid casting; - Add new 'struct device *dev' variable as a shorthand for '&priv->ofdev->dev' that is used all over the place, also rename 'struct net_device *dev' to 'struct net_device *ndev'; - Turn printk(KERN_ERR ...) to pr_err(...), which is shorter; - Don't return bogus -1 (i.e. -EPERM) when request_irq() fails; - Turn '&priv->regs->' to just '&regs->'. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/gianfar.c143
1 files changed, 64 insertions, 79 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 1e5289f..5d6480c 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -925,16 +925,17 @@ void gfar_start(struct net_device *dev)
}
/* Bring the controller up and running */
-int startup_gfar(struct net_device *dev)
+int startup_gfar(struct net_device *ndev)
{
struct txbd8 *txbdp;
struct rxbd8 *rxbdp;
dma_addr_t addr = 0;
- unsigned long vaddr;
+ void *vaddr;
int i;
- struct gfar_private *priv = netdev_priv(dev);
+ struct gfar_private *priv = netdev_priv(ndev);
+ struct device *dev = &priv->ofdev->dev;
struct gfar __iomem *regs = priv->regs;
- int err = 0;
+ int err;
u32 rctrl = 0;
u32 tctrl = 0;
u32 attrs = 0;
@@ -942,38 +943,34 @@ int startup_gfar(struct net_device *dev)
gfar_write(&regs->imask, IMASK_INIT_CLEAR);
/* Allocate memory for the buffer descriptors */
- vaddr = (unsigned long) dma_alloc_coherent(&priv->ofdev->dev,
- sizeof (struct txbd8) * priv->tx_ring_size +
- sizeof (struct rxbd8) * priv->rx_ring_size,
- &addr, GFP_KERNEL);
-
- if (vaddr == 0) {
+ vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
+ sizeof(*rxbdp) * priv->rx_ring_size,
+ &addr, GFP_KERNEL);
+ if (!vaddr) {
if (netif_msg_ifup(priv))
- printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n",
- dev->name);
+ pr_err("%s: Could not allocate buffer descriptors!\n",
+ ndev->name);
return -ENOMEM;
}
- priv->tx_bd_base = (struct txbd8 *) vaddr;
+ priv->tx_bd_base = vaddr;
/* enet DMA only understands physical addresses */
gfar_write(&regs->tbase0, addr);
/* Start the rx descriptor ring where the tx ring leaves off */
- addr = addr + sizeof (struct txbd8) * priv->tx_ring_size;
- vaddr = vaddr + sizeof (struct txbd8) * priv->tx_ring_size;
- priv->rx_bd_base = (struct rxbd8 *) vaddr;
+ addr = addr + sizeof(*txbdp) * priv->tx_ring_size;
+ vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size;
+ priv->rx_bd_base = vaddr;
gfar_write(&regs->rbase0, addr);
/* Setup the skbuff rings */
- priv->tx_skbuff =
- (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
- priv->tx_ring_size, GFP_KERNEL);
-
- if (NULL == priv->tx_skbuff) {
+ priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) *
+ priv->tx_ring_size, GFP_KERNEL);
+ if (!priv->tx_skbuff) {
if (netif_msg_ifup(priv))
- printk(KERN_ERR "%s: Could not allocate tx_skbuff\n",
- dev->name);
+ pr_err("%s: Could not allocate tx_skbuff\n",
+ ndev->name);
err = -ENOMEM;
goto tx_skb_fail;
}
@@ -981,14 +978,12 @@ int startup_gfar(struct net_device *dev)
for (i = 0; i < priv->tx_ring_size; i++)
priv->tx_skbuff[i] = NULL;
- priv->rx_skbuff =
- (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
- priv->rx_ring_size, GFP_KERNEL);
-
- if (NULL == priv->rx_skbuff) {
+ priv->rx_skbuff = kmalloc(sizeof(*priv->rx_skbuff) *
+ priv->rx_ring_size, GFP_KERNEL);
+ if (!priv->rx_skbuff) {
if (netif_msg_ifup(priv))
- printk(KERN_ERR "%s: Could not allocate rx_skbuff\n",
- dev->name);
+ pr_err("%s: Could not allocate rx_skbuff\n",
+ ndev->name);
err = -ENOMEM;
goto rx_skb_fail;
}
@@ -1019,18 +1014,16 @@ int startup_gfar(struct net_device *dev)
for (i = 0; i < priv->rx_ring_size; i++) {
struct sk_buff *skb;
- skb = gfar_new_skb(dev);
-
+ skb = gfar_new_skb(ndev);
if (!skb) {
- printk(KERN_ERR "%s: Can't allocate RX buffers\n",
- dev->name);
-
+ pr_err("%s: Can't allocate RX buffers\n", ndev->name);
+ err = -ENOMEM;
goto err_rxalloc_fail;
}
priv->rx_skbuff[i] = skb;
- gfar_new_rxbdp(dev, rxbdp, skb);
+ gfar_new_rxbdp(ndev, rxbdp, skb);
rxbdp++;
}
@@ -1044,44 +1037,39 @@ int startup_gfar(struct net_device *dev)
if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
/* Install our interrupt handlers for Error,
* Transmit, and Receive */
- if (request_irq(priv->interruptError, gfar_error,
- 0, priv->int_name_er, dev) < 0) {
+ err = request_irq(priv->interruptError, gfar_error, 0,
+ priv->int_name_er, ndev);
+ if (err) {
if (netif_msg_intr(priv))
- printk(KERN_ERR "%s: Can't get IRQ %d\n",
- dev->name, priv->interruptError);
-
- err = -1;
+ pr_err("%s: Can't get IRQ %d\n", ndev->name,
+ priv->interruptError);
goto err_irq_fail;
}
- if (request_irq(priv->interruptTransmit, gfar_transmit,
- 0, priv->int_name_tx, dev) < 0) {
+ err = request_irq(priv->interruptTransmit, gfar_transmit, 0,
+ priv->int_name_tx, ndev);
+ if (err) {
if (netif_msg_intr(priv))
- printk(KERN_ERR "%s: Can't get IRQ %d\n",
- dev->name, priv->interruptTransmit);
-
- err = -1;
-
+ pr_err("%s: Can't get IRQ %d\n", ndev->name,
+ priv->interruptTransmit);
goto tx_irq_fail;
}
- if (request_irq(priv->interruptReceive, gfar_receive,
- 0, priv->int_name_rx, dev) < 0) {
+ err = request_irq(priv->interruptReceive, gfar_receive, 0,
+ priv->int_name_rx, ndev);
+ if (err) {
if (netif_msg_intr(priv))
- printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
- dev->name, priv->interruptReceive);
-
- err = -1;
+ pr_err("%s: Can't get IRQ %d (receive0)\n",
+ ndev->name, priv->interruptReceive);
goto rx_irq_fail;
}
} else {
- if (request_irq(priv->interruptTransmit, gfar_interrupt,
- 0, priv->int_name_tx, dev) < 0) {
+ err = request_irq(priv->interruptTransmit, gfar_interrupt,
+ 0, priv->int_name_tx, ndev);
+ if (err) {
if (netif_msg_intr(priv))
- printk(KERN_ERR "%s: Can't get IRQ %d\n",
- dev->name, priv->interruptTransmit);
-
- err = -1;
+ pr_err("%s: Can't get IRQ %d\n", ndev->name,
+ priv->interruptTransmit);
goto err_irq_fail;
}
}
@@ -1103,7 +1091,7 @@ int startup_gfar(struct net_device *dev)
if (priv->extended_hash) {
rctrl |= RCTRL_EXTHASH;
- gfar_clear_exact_match(dev);
+ gfar_clear_exact_match(ndev);
rctrl |= RCTRL_EMEN;
}
@@ -1119,18 +1107,18 @@ int startup_gfar(struct net_device *dev)
}
/* Init rctrl based on our settings */
- gfar_write(&priv->regs->rctrl, rctrl);
+ gfar_write(&regs->rctrl, rctrl);
- if (dev->features & NETIF_F_IP_CSUM)
+ if (ndev->features & NETIF_F_IP_CSUM)
tctrl |= TCTRL_INIT_CSUM;
- gfar_write(&priv->regs->tctrl, tctrl);
+ gfar_write(&regs->tctrl, tctrl);
/* Set the extraction length and index */
attrs = ATTRELI_EL(priv->rx_stash_size) |
ATTRELI_EI(priv->rx_stash_index);
- gfar_write(&priv->regs->attreli, attrs);
+ gfar_write(&regs->attreli, attrs);
/* Start with defaults, and add stashing or locking
* depending on the approprate variables */
@@ -1142,32 +1130,29 @@ int startup_gfar(struct net_device *dev)
if (priv->rx_stash_size != 0)
attrs |= ATTR_BUFSTASH;
- gfar_write(&priv->regs->attr, attrs);
+ gfar_write(&regs->attr, attrs);
- gfar_write(&priv->regs->fifo_tx_thr, priv->fifo_threshold);
- gfar_write(&priv->regs->fifo_tx_starve, priv->fifo_starve);
- gfar_write(&priv->regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
+ gfar_write(&regs->fifo_tx_thr, priv->fifo_threshold);
+ gfar_write(&regs->fifo_tx_starve, priv->fifo_starve);
+ gfar_write(&regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
/* Start the controller */
- gfar_start(dev);
+ gfar_start(ndev);
return 0;
rx_irq_fail:
- free_irq(priv->interruptTransmit, dev);
+ free_irq(priv->interruptTransmit, ndev);
tx_irq_fail:
- free_irq(priv->interruptError, dev);
+ free_irq(priv->interruptError, ndev);
err_irq_fail:
err_rxalloc_fail:
rx_skb_fail:
free_skb_resources(priv);
tx_skb_fail:
- dma_free_coherent(&priv->ofdev->dev,
- sizeof(struct txbd8)*priv->tx_ring_size
- + sizeof(struct rxbd8)*priv->rx_ring_size,
- priv->tx_bd_base,
- gfar_read(&regs->tbase0));
-
+ dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
+ sizeof(*rxbdp) * priv->rx_ring_size,
+ priv->tx_bd_base, gfar_read(&regs->tbase0));
return err;
}
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