[PATCH staging 3/6] et131x: fix error paths in et131x_pci_setup.

Francois Romieu
2011-10-23T17:15:01Z

Wrong status code and unbalanced phy_connect.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
---
drivers/staging/et131x/et131x.c | 99 +++++++++++++++------------------------
1 files changed, 38 insertions(+), 61 deletions(-)

diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c
index 2ae7819..2b6ca6a 100644
--- a/drivers/staging/et131x/et131x.c
+++ b/drivers/staging/et131x/et131x.c
@@ -4402,6 +4402,7 @@ static void __devexit et131x_pci_remove(struct pci_dev *pdev)
struct et131x_adapter *adapter = netdev_priv(netdev);

unregister_netdev(netdev);
+ phy_disconnect(adapter->phydev);
mdiobus_unregister(adapter->mii_bus);
kfree(adapter->mii_bus->irq);
mdiobus_free(adapter->mii_bus);
@@ -5245,40 +5246,6 @@ static const struct net_device_ops et131x_netdev_ops = {
};

/**
- * et131x_device_alloc
- *
- * Returns pointer to the allocated and initialized net_device struct for
- * this device.
- *
- * Create instances of net_device and wl_private for the new adapter and
- * register the device's entry points in the net_device structure.
- */
-struct net_device *et131x_device_alloc(void)
-{
- struct net_device *netdev;
-
- /* Alloc net_device and adapter structs */
- netdev = alloc_etherdev(sizeof(struct et131x_adapter));
-
- if (!netdev) {
- printk(KERN_ERR "et131x: Alloc of net_device struct failed\n");
- return NULL;
- }
-
- /*
- * Setup the function registration table (and other data) for a
- * net_device
- */
- netdev->watchdog_timeo = ET131X_TX_TIMEOUT;
- netdev->netdev_ops = &et131x_netdev_ops;
-
- /* Poll? */
- /* netdev->poll = &et131x_poll; */
- /* netdev->poll_controller = &et131x_poll_controller; */
- return netdev;
-}
-
-/**
* et131x_pci_setup - Perform device initialization
* @pdev: a pointer to the device's pci_dev structure
* @ent: this device's entry in the pci_device_id table
@@ -5293,24 +5260,26 @@ struct net_device *et131x_device_alloc(void)
static int __devinit et131x_pci_setup(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
- int result;
struct net_device *netdev;
struct et131x_adapter *adapter;
+ int rc;
int ii;

- result = pci_enable_device(pdev);
- if (result) {
+ rc = pci_enable_device(pdev);
+ if (rc < 0) {
dev_err(&pdev->dev, "pci_enable_device() failed\n");
- goto err_out;
+ goto out;
}

/* Perform some basic PCI checks */
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
dev_err(&pdev->dev, "Can't find PCI device's base address\n");
+ rc = -ENODEV;
goto err_disable;
}

- if (pci_request_regions(pdev, DRIVER_NAME)) {
+ rc = pci_request_regions(pdev, DRIVER_NAME);
+ if (rc < 0) {
dev_err(&pdev->dev, "Can't get PCI resources\n");
goto err_disable;
}
@@ -5319,46 +5288,50 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,

/* Check the DMA addressing support of this device */
if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
- result = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
- if (result) {
+ rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
+ if (rc < 0) {
dev_err(&pdev->dev,
"Unable to obtain 64 bit DMA for consistent allocations\n");
goto err_release_res;
}
} else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
- result = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
- if (result) {
+ rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (rc < 0) {
dev_err(&pdev->dev,
"Unable to obtain 32 bit DMA for consistent allocations\n");
goto err_release_res;
}
} else {
dev_err(&pdev->dev, "No usable DMA addressing method\n");
- result = -EIO;
+ rc = -EIO;
goto err_release_res;
}

/* Allocate netdev and private adapter structs */
- netdev = et131x_device_alloc();
+ netdev = alloc_etherdev(sizeof(struct et131x_adapter));
if (!netdev) {
dev_err(&pdev->dev, "Couldn't alloc netdev struct\n");
- result = -ENOMEM;
+ rc = -ENOMEM;
goto err_release_res;
}

+ netdev->watchdog_timeo = ET131X_TX_TIMEOUT;
+ netdev->netdev_ops = &et131x_netdev_ops;
+
SET_NETDEV_DEV(netdev, &pdev->dev);
et131x_set_ethtool_ops(netdev);

adapter = et131x_adapter_init(netdev, pdev);

- /* Initialise the PCI setup for the device */
- et131x_pci_init(adapter, pdev);
+ rc = et131x_pci_init(adapter, pdev);
+ if (rc < 0)
+ goto err_free_dev;

/* Map the bus-relative registers to system virtual memory */
adapter->regs = pci_ioremap_bar(pdev, 0);
if (!adapter->regs) {
dev_err(&pdev->dev, "Cannot map device registers\n");
- result = -ENOMEM;
+ rc = -ENOMEM;
goto err_free_dev;
}

@@ -5372,8 +5345,8 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
et131x_disable_interrupts(adapter);

/* Allocate DMA memory */
- result = et131x_adapter_memory_alloc(adapter);
- if (result) {
+ rc = et131x_adapter_memory_alloc(adapter);
+ if (rc < 0) {
dev_err(&pdev->dev, "Could not alloc adapater memory (DMA)\n");
goto err_iounmap;
}
@@ -5391,6 +5364,8 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
adapter->boot_coma = 0;
et1310_disable_phy_coma(adapter);

+ rc = -ENOMEM;
+
/* Setup the mii_bus struct */
adapter->mii_bus = mdiobus_alloc();
if (!adapter->mii_bus) {
@@ -5414,13 +5389,14 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
for (ii = 0; ii < PHY_MAX_ADDR; ii++)
adapter->mii_bus->irq[ii] = PHY_POLL;

- if (mdiobus_register(adapter->mii_bus)) {
+ rc = mdiobus_register(adapter->mii_bus);
+ if (rc < 0) {
dev_err(&pdev->dev, "failed to register MII bus\n");
- mdiobus_free(adapter->mii_bus);
goto err_mdio_free_irq;
}

- if (et131x_mii_probe(netdev)) {
+ rc = et131x_mii_probe(netdev);
+ if (rc < 0) {
dev_err(&pdev->dev, "failed to probe MII bus\n");
goto err_mdio_unregister;
}
@@ -5436,10 +5412,10 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
*/

/* Register the net_device struct with the Linux network layer */
- result = register_netdev(netdev);
- if (result != 0) {
+ rc = register_netdev(netdev);
+ if (rc < 0) {
dev_err(&pdev->dev, "register_netdev() failed\n");
- goto err_mdio_unregister;
+ goto err_phy_disconnect;
}

/* Register the net_device struct with the PCI subsystem. Save a copy
@@ -5448,9 +5424,11 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
*/
pci_set_drvdata(pdev, netdev);
pci_save_state(adapter->pdev);
+out:
+ return rc;

- return result;
-
+err_phy_disconnect:
+ phy_disconnect(adapter->phydev);
err_mdio_unregister:
mdiobus_unregister(adapter->mii_bus);
err_mdio_free_irq:
@@ -5468,8 +5446,7 @@ err_release_res:
pci_release_regions(pdev);
err_disable:
pci_disable_device(pdev);
-err_out:
- return result;
+ goto out;
}

static SIMPLE_DEV_PM_OPS(et131x_pm_ops, et131x_suspend, et131x_resume);
--
1.7.6.4