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xircom_cb: fix device probe error path.

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- unbalanced pci_disable_device
- PCI ressources were not released
- mismatching pci_alloc_.../kfree pairs are replaced by DMA alloc helpers.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Ack-by: Grant Grundler <grundler@parisc-linux.org>
This commit is contained in:
Francois Romieu 2012-03-11 23:34:54 +01:00
parent 5e58deb917
commit d59a1881c0
1 changed files with 34 additions and 19 deletions
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53
drivers/net/ethernet/dec/tulip/xircom_cb.c
View File

@ -192,15 +192,18 @@ static const struct net_device_ops netdev_ops = {
*/
static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct device *d = &pdev->dev;
struct net_device *dev = NULL;
struct xircom_private *private;
unsigned long flags;
unsigned short tmp16;
int rc;
/* First do the PCI initialisation */
if (pci_enable_device(pdev))
return -ENODEV;
rc = pci_enable_device(pdev);
if (rc < 0)
goto out;
/* disable all powermanagement */
pci_write_config_dword(pdev, PCI_POWERMGMT, 0x0000);
@ -211,11 +214,13 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
pci_read_config_word (pdev,PCI_STATUS, &tmp16);
pci_write_config_word (pdev, PCI_STATUS,tmp16);
if (!request_region(pci_resource_start(pdev, 0), 128, "xircom_cb")) {
rc = pci_request_regions(pdev, "xircom_cb");
if (rc < 0) {
pr_err("%s: failed to allocate io-region\n", __func__);
return -ENODEV;
goto err_disable;
}
rc = -ENOMEM;
/*
Before changing the hardware, allocate the memory.
This way, we can fail gracefully if not enough memory
@ -223,17 +228,21 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
*/
dev = alloc_etherdev(sizeof(struct xircom_private));
if (!dev)
goto device_fail;
goto err_release;
private = netdev_priv(dev);
/* Allocate the send/receive buffers */
private->rx_buffer = pci_alloc_consistent(pdev,8192,&private->rx_dma_handle);
private->rx_buffer = dma_alloc_coherent(d, 8192,
&private->rx_dma_handle,
GFP_KERNEL);
if (private->rx_buffer == NULL) {
pr_err("%s: no memory for rx buffer\n", __func__);
goto rx_buf_fail;
}
private->tx_buffer = pci_alloc_consistent(pdev,8192,&private->tx_dma_handle);
private->tx_buffer = dma_alloc_coherent(d, 8192,
&private->tx_dma_handle,
GFP_KERNEL);
if (private->tx_buffer == NULL) {
pr_err("%s: no memory for tx buffer\n", __func__);
goto tx_buf_fail;
@ -256,7 +265,8 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
dev->netdev_ops = &netdev_ops;
pci_set_drvdata(pdev, dev);
if (register_netdev(dev)) {
rc = register_netdev(dev);
if (rc < 0) {
pr_err("%s: netdevice registration failed\n", __func__);
goto reg_fail;
}
@ -273,17 +283,21 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
spin_unlock_irqrestore(&private->lock,flags);
trigger_receive(private);
return 0;
out:
return rc;
reg_fail:
kfree(private->tx_buffer);
pci_set_drvdata(pdev, NULL);
dma_free_coherent(d, 8192, private->tx_buffer, private->tx_dma_handle);
tx_buf_fail:
kfree(private->rx_buffer);
dma_free_coherent(d, 8192, private->rx_buffer, private->rx_dma_handle);
rx_buf_fail:
free_netdev(dev);
device_fail:
return -ENODEV;
err_release:
pci_release_regions(pdev);
err_disable:
pci_disable_device(pdev);
goto out;
}
@ -297,14 +311,15 @@ static void __devexit xircom_remove(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct xircom_private *card = netdev_priv(dev);
struct device *d = &pdev->dev;
pci_free_consistent(pdev,8192,card->rx_buffer,card->rx_dma_handle);
pci_free_consistent(pdev,8192,card->tx_buffer,card->tx_dma_handle);
release_region(dev->base_addr, 128);
unregister_netdev(dev);
free_netdev(dev);
pci_set_drvdata(pdev, NULL);
dma_free_coherent(d, 8192, card->tx_buffer, card->tx_dma_handle);
dma_free_coherent(d, 8192, card->rx_buffer, card->rx_dma_handle);
free_netdev(dev);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static irqreturn_t xircom_interrupt(int irq, void *dev_instance)