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Input: gpio_keys - convert to use devm_*

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This makes the error handling much more simpler than open-coding everything
and in addition makes the probe function smaller an tidier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Andy Shevchenko 2014-04-25 14:21:59 -07:00 committed by Dmitry Torokhov
parent 1f9e1470ab
commit 5d422f2e78
1 changed files with 25 additions and 49 deletions
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74
drivers/input/keyboard/gpio_keys.c
View file

@ -578,23 +578,18 @@ gpio_keys_get_devtree_pdata(struct device *dev)
int i;
node = dev->of_node;
if (!node) {
error = -ENODEV;
goto err_out;
}
if (!node)
return ERR_PTR(-ENODEV);
nbuttons = of_get_child_count(node);
if (nbuttons == 0) {
error = -ENODEV;
goto err_out;
}
if (nbuttons == 0)
return ERR_PTR(-ENODEV);
pdata = kzalloc(sizeof(*pdata) + nbuttons * (sizeof *button),
GFP_KERNEL);
if (!pdata) {
error = -ENOMEM;
goto err_out;
}
pdata = devm_kzalloc(dev,
sizeof(*pdata) + nbuttons * sizeof(*button),
GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
pdata->nbuttons = nbuttons;
@ -619,7 +614,7 @@ gpio_keys_get_devtree_pdata(struct device *dev)
dev_err(dev,
"Failed to get gpio flags, error: %d\n",
error);
goto err_free_pdata;
return ERR_PTR(error);
}
button = &pdata->buttons[i++];
@ -630,8 +625,7 @@ gpio_keys_get_devtree_pdata(struct device *dev)
if (of_property_read_u32(pp, "linux,code", &button->code)) {
dev_err(dev, "Button without keycode: 0x%x\n",
button->gpio);
error = -EINVAL;
goto err_free_pdata;
return ERR_PTR(-EINVAL);
}
button->desc = of_get_property(pp, "label", NULL);
@ -646,17 +640,10 @@ gpio_keys_get_devtree_pdata(struct device *dev)
button->debounce_interval = 5;
}
if (pdata->nbuttons == 0) {
error = -EINVAL;
goto err_free_pdata;
}
if (pdata->nbuttons == 0)
return ERR_PTR(-EINVAL);
return pdata;
err_free_pdata:
kfree(pdata);
err_out:
return ERR_PTR(error);
}
static struct of_device_id gpio_keys_of_match[] = {
@ -691,6 +678,7 @@ static int gpio_keys_probe(struct platform_device *pdev)
const struct gpio_keys_platform_data *pdata = dev_get_platdata(dev);
struct gpio_keys_drvdata *ddata;
struct input_dev *input;
size_t size;
int i, error;
int wakeup = 0;
@ -700,14 +688,18 @@ static int gpio_keys_probe(struct platform_device *pdev)
return PTR_ERR(pdata);
}
ddata = kzalloc(sizeof(struct gpio_keys_drvdata) +
pdata->nbuttons * sizeof(struct gpio_button_data),
GFP_KERNEL);
input = input_allocate_device();
if (!ddata || !input) {
size = sizeof(struct gpio_keys_drvdata) +
pdata->nbuttons * sizeof(struct gpio_button_data);
ddata = devm_kzalloc(dev, size, GFP_KERNEL);
if (!ddata) {
dev_err(dev, "failed to allocate state\n");
error = -ENOMEM;
goto fail1;
return -ENOMEM;
}
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(dev, "failed to allocate input device\n");
return -ENOMEM;
}
ddata->pdata = pdata;
@ -768,20 +760,12 @@ static int gpio_keys_probe(struct platform_device *pdev)
while (--i >= 0)
gpio_remove_key(&ddata->data[i]);
fail1:
input_free_device(input);
kfree(ddata);
/* If we have no platform data, we allocated pdata dynamically. */
if (!dev_get_platdata(&pdev->dev))
kfree(pdata);
return error;
}
static int gpio_keys_remove(struct platform_device *pdev)
{
struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev);
struct input_dev *input = ddata->input;
int i;
sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group);
@ -791,14 +775,6 @@ static int gpio_keys_remove(struct platform_device *pdev)
for (i = 0; i < ddata->pdata->nbuttons; i++)
gpio_remove_key(&ddata->data[i]);
input_unregister_device(input);
/* If we have no platform data, we allocated pdata dynamically. */
if (!dev_get_platdata(&pdev->dev))
kfree(ddata->pdata);
kfree(ddata);
return 0;
}