From d59a1881c0ff63f9edbc7f4ad5a5e593fe779e1b Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Sun, 11 Mar 2012 23:34:54 +0100 Subject: [PATCH] xircom_cb: fix device probe error path. - 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 Ack-by: Grant Grundler --- drivers/net/ethernet/dec/tulip/xircom_cb.c | 53 ++++++++++++++-------- 1 file changed, 34 insertions(+), 19 deletions(-) diff --git a/drivers/net/ethernet/dec/tulip/xircom_cb.c b/drivers/net/ethernet/dec/tulip/xircom_cb.c index fdb329fe6e8e..cbcc6d6f3f31 100644 --- a/drivers/net/ethernet/dec/tulip/xircom_cb.c +++ b/drivers/net/ethernet/dec/tulip/xircom_cb.c @@ -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) -- 2.39.5