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Input: rotary_encoder - convert to devm-* api 

Use managed resource API for simplifying error paths.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Timo Teräs 2016-01-16 20:22:07 -08:00 committed by Dmitry Torokhov
parent afd2ff9b7e
commit d9202af2ff
1 changed files with 25 additions and 61 deletions
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86
drivers/input/misc/rotary_encoder.c
View File

@ -211,8 +211,8 @@ static struct rotary_encoder_platform_data *rotary_encoder_parse_dt(struct devic
if (!of_id || !np)
return NULL;
pdata = kzalloc(sizeof(struct rotary_encoder_platform_data),
GFP_KERNEL);
pdata = devm_kzalloc(dev, sizeof(struct rotary_encoder_platform_data),
GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
@ -277,12 +277,13 @@ static int rotary_encoder_probe(struct platform_device *pdev)
}
}
encoder = kzalloc(sizeof(struct rotary_encoder), GFP_KERNEL);
input = input_allocate_device();
if (!encoder || !input) {
err = -ENOMEM;
goto exit_free_mem;
}
encoder = devm_kzalloc(dev, sizeof(struct rotary_encoder), GFP_KERNEL);
if (!encoder)
return -ENOMEM;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
encoder->input = input;
encoder->pdata = pdata;
@ -301,16 +302,18 @@ static int rotary_encoder_probe(struct platform_device *pdev)
}
/* request the GPIOs */
err = gpio_request_one(pdata->gpio_a, GPIOF_IN, dev_name(dev));
err = devm_gpio_request_one(dev, pdata->gpio_a, GPIOF_IN,
dev_name(dev));
if (err) {
dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_a);
goto exit_free_mem;
return err;
}
err = gpio_request_one(pdata->gpio_b, GPIOF_IN, dev_name(dev));
err = devm_gpio_request_one(dev, pdata->gpio_b, GPIOF_IN,
dev_name(dev));
if (err) {
dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_b);
goto exit_free_gpio_a;
return err;
}
encoder->irq_a = gpio_to_irq(pdata->gpio_a);
@ -331,30 +334,29 @@ static int rotary_encoder_probe(struct platform_device *pdev)
default:
dev_err(dev, "'%d' is not a valid steps-per-period value\n",
pdata->steps_per_period);
err = -EINVAL;
goto exit_free_gpio_b;
return -EINVAL;
}
err = request_irq(encoder->irq_a, handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
DRV_NAME, encoder);
err = devm_request_irq(dev, encoder->irq_a, handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
DRV_NAME, encoder);
if (err) {
dev_err(dev, "unable to request IRQ %d\n", encoder->irq_a);
goto exit_free_gpio_b;
return err;
}
err = request_irq(encoder->irq_b, handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
DRV_NAME, encoder);
err = devm_request_irq(dev, encoder->irq_b, handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
DRV_NAME, encoder);
if (err) {
dev_err(dev, "unable to request IRQ %d\n", encoder->irq_b);
goto exit_free_irq_a;
return err;
}
err = input_register_device(input);
if (err) {
dev_err(dev, "failed to register input device\n");
goto exit_free_irq_b;
return err;
}
device_init_wakeup(&pdev->dev, pdata->wakeup_source);
@ -362,43 +364,6 @@ static int rotary_encoder_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, encoder);
return 0;
exit_free_irq_b:
free_irq(encoder->irq_b, encoder);
exit_free_irq_a:
free_irq(encoder->irq_a, encoder);
exit_free_gpio_b:
gpio_free(pdata->gpio_b);
exit_free_gpio_a:
gpio_free(pdata->gpio_a);
exit_free_mem:
input_free_device(input);
kfree(encoder);
if (!dev_get_platdata(&pdev->dev))
kfree(pdata);
return err;
}
static int rotary_encoder_remove(struct platform_device *pdev)
{
struct rotary_encoder *encoder = platform_get_drvdata(pdev);
const struct rotary_encoder_platform_data *pdata = encoder->pdata;
device_init_wakeup(&pdev->dev, false);
free_irq(encoder->irq_a, encoder);
free_irq(encoder->irq_b, encoder);
gpio_free(pdata->gpio_a);
gpio_free(pdata->gpio_b);
input_unregister_device(encoder->input);
kfree(encoder);
if (!dev_get_platdata(&pdev->dev))
kfree(pdata);
return 0;
}
#ifdef CONFIG_PM_SLEEP
@ -432,7 +397,6 @@ static SIMPLE_DEV_PM_OPS(rotary_encoder_pm_ops,
static struct platform_driver rotary_encoder_driver = {
.probe = rotary_encoder_probe,
.remove = rotary_encoder_remove,
.driver = {
.name = DRV_NAME,
.pm = &rotary_encoder_pm_ops,