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gpio/langwell: use devm_* helpers to simplify probe

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Use devm_* helper functions where possible to make the error handling in
the probe function simpler.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Mika Westerberg 2012-04-05 12:15:15 +03:00 committed by Grant Likely
parent fc3a1f04f5
commit 8302c74138
1 changed files with 7 additions and 11 deletions
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18
drivers/gpio/gpio-langwell.c
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@ -309,7 +309,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
retval = pci_enable_device(pdev);
if (retval)
goto done;
return retval;
retval = pci_request_regions(pdev, "langwell_gpio");
if (retval) {
@ -331,18 +331,18 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
/* get the register base from bar0 */
start = pci_resource_start(pdev, 0);
len = pci_resource_len(pdev, 0);
base = ioremap_nocache(start, len);
base = devm_ioremap_nocache(&pdev->dev, start, len);
if (!base) {
dev_err(&pdev->dev, "error mapping bar0\n");
retval = -EFAULT;
goto err3;
}
lnw = kzalloc(sizeof(struct lnw_gpio), GFP_KERNEL);
lnw = devm_kzalloc(&pdev->dev, sizeof(struct lnw_gpio), GFP_KERNEL);
if (!lnw) {
dev_err(&pdev->dev, "can't allocate langwell_gpio chip data\n");
retval = -ENOMEM;
goto err4;
goto err3;
}
lnw->reg_base = base;
lnw->irq_base = irq_base;
@ -361,7 +361,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
retval = gpiochip_add(&lnw->chip);
if (retval) {
dev_err(&pdev->dev, "langwell gpiochip_add error %d\n", retval);
goto err5;
goto err3;
}
irq_set_handler_data(pdev->irq, lnw);
irq_set_chained_handler(pdev->irq, lnw_irq_handler);
@ -376,16 +376,12 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_allow(&pdev->dev);
goto done;
err5:
kfree(lnw);
err4:
iounmap(base);
return 0;
err3:
pci_release_regions(pdev);
err2:
pci_disable_device(pdev);
done:
return retval;
}