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Date: Mon, 29 Aug 2011 18:42:36 +0100
From: Mark Einon <mark.einon@...il.com>
To: gregkh@...e.de
Cc: greg@...ah.com, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org, o.hartmann@...ovital.com,
Mark Einon <mark.einon@...il.com>
Subject: [PATCH 1/6] staging: et131x: Further tidy up of 131x_pci_setup()
* Removed unused bool variable.
* Eliminated mid-function returns, used gotos instead
Signed-off-by: Mark Einon <mark.einon@...il.com>
---
drivers/staging/et131x/et131x_initpci.c | 58 ++++++++++++++----------------
drivers/staging/et131x/et131x_netdev.c | 2 +-
2 files changed, 28 insertions(+), 32 deletions(-)
diff --git a/drivers/staging/et131x/et131x_initpci.c b/drivers/staging/et131x/et131x_initpci.c
index 072cfb5..813a72f 100644
--- a/drivers/staging/et131x/et131x_initpci.c
+++ b/drivers/staging/et131x/et131x_initpci.c
@@ -512,10 +512,6 @@ static struct et131x_adapter *et131x_adapter_init(struct net_device *netdev,
struct et131x_adapter *adapter;
- /* Setup the fundamental net_device and private adapter structure
- * elements */
- SET_NETDEV_DEV(netdev, &pdev->dev);
-
/* Allocate private adapter struct and copy in relevant information */
adapter = netdev_priv(netdev);
adapter->pdev = pci_dev_get(pdev);
@@ -579,33 +575,29 @@ static struct et131x_adapter *et131x_adapter_init(struct net_device *netdev,
static int __devinit et131x_pci_setup(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
- int result = -EBUSY;
+ int result;
int pm_cap;
- bool pci_using_dac;
struct net_device *netdev;
struct et131x_adapter *adapter;
/* Enable the device via the PCI subsystem */
- if (pci_enable_device(pdev) != 0) {
- dev_err(&pdev->dev,
- "pci_enable_device() failed\n");
- return -EIO;
+ result = pci_enable_device(pdev);
+ if (result) {
+ dev_err(&pdev->dev, "pci_enable_device() failed\n");
+ goto err_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");
+ dev_err(&pdev->dev, "Can't find PCI device's base address\n");
goto err_disable;
}
if (pci_request_regions(pdev, DRIVER_NAME)) {
- dev_err(&pdev->dev,
- "Can't get PCI resources\n");
+ dev_err(&pdev->dev, "Can't get PCI resources\n");
goto err_disable;
}
- /* Enable PCI bus mastering */
pci_set_master(pdev);
/* Query PCI for Power Mgmt Capabilities
@@ -614,7 +606,7 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
* needed?
*/
pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
- if (pm_cap == 0) {
+ if (!pm_cap) {
dev_err(&pdev->dev,
"Cannot find Power Management capabilities\n");
result = -EIO;
@@ -623,37 +615,42 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
/* Check the DMA addressing support of this device */
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
- pci_using_dac = true;
-
result = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
- if (result != 0) {
+ if (result) {
dev_err(&pdev->dev,
- "Unable to obtain 64 bit DMA for consistent allocations\n");
+ "Unable to obtain 64 bit DMA for consistent allocations\n");
goto err_release_res;
}
} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
- pci_using_dac = false;
+ result = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (result) {
+ 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");
+ dev_err(&pdev->dev, "No usable DMA addressing method\n");
result = -EIO;
goto err_release_res;
}
/* Allocate netdev and private adapter structs */
netdev = et131x_device_alloc();
- if (netdev == NULL) {
+ if (!netdev) {
dev_err(&pdev->dev, "Couldn't alloc netdev struct\n");
result = -ENOMEM;
goto err_release_res;
}
+
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+
adapter = et131x_adapter_init(netdev, pdev);
/* Initialise the PCI setup for the device */
et131x_pci_init(adapter, pdev);
/* Map the bus-relative registers to system virtual memory */
adapter->regs = pci_ioremap_bar(pdev, 0);
- if (adapter->regs == NULL) {
+ if (!adapter->regs) {
dev_err(&pdev->dev, "Cannot map device registers\n");
result = -ENOMEM;
goto err_free_dev;
@@ -670,7 +667,7 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
/* Allocate DMA memory */
result = et131x_adapter_memory_alloc(adapter);
- if (result != 0) {
+ if (result) {
dev_err(&pdev->dev, "Could not alloc adapater memory (DMA)\n");
goto err_iounmap;
}
@@ -678,9 +675,7 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
/* Init send data structures */
et131x_init_send(adapter);
- /*
- * Set up the task structure for the ISR's deferred handler
- */
+ /* Set up the task structure for the ISR's deferred handler */
INIT_WORK(&adapter->task, et131x_isr_handler);
/* Copy address into the net_device struct */
@@ -699,8 +694,7 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
/* Initialize link state */
netif_carrier_off(adapter->netdev);
- /* Initialize variable for counting how long we do not have
- link status */
+ /* Init variable for counting how long we do not have link status */
adapter->boot_coma = 0;
/* We can enable interrupts now
@@ -723,6 +717,7 @@ static int __devinit et131x_pci_setup(struct pci_dev *pdev,
*/
pci_set_drvdata(pdev, netdev);
pci_save_state(adapter->pdev);
+
return result;
err_mem_free:
@@ -736,6 +731,7 @@ err_release_res:
pci_release_regions(pdev);
err_disable:
pci_disable_device(pdev);
+err_out:
return result;
}
diff --git a/drivers/staging/et131x/et131x_netdev.c b/drivers/staging/et131x/et131x_netdev.c
index 7555a24..20df145 100644
--- a/drivers/staging/et131x/et131x_netdev.c
+++ b/drivers/staging/et131x/et131x_netdev.c
@@ -687,7 +687,7 @@ struct net_device *et131x_device_alloc(void)
/* Alloc net_device and adapter structs */
netdev = alloc_etherdev(sizeof(struct et131x_adapter));
- if (netdev == NULL) {
+ if (!netdev) {
printk(KERN_ERR "et131x: Alloc of net_device struct failed\n");
return NULL;
}
--
1.7.6
--
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