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iio: stx104: Utilize devm_ functions in driver probe callback

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The devm_ resource manager functions allow memory to be automatically
released when a device is unbound. This patch takes advantage of the
resource manager functions and replaces the gpiochip_add_data call and
iio_device_register call with the devm_gpiochip_add_data call and
devm_iio_device_register call respectively. In addition, the
stx104_remove function has been removed as no longer necessary due to
the use of the relevant devm_ resource manager functions.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
William Breathitt Gray 2017-01-24 15:26:17 -05:00 committed by Jonathan Cameron
parent 75de554610
commit b2d226caec
1 changed files with 2 additions and 20 deletions
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22
drivers/iio/adc/stx104.c
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@ -339,30 +339,13 @@ static int stx104_probe(struct device *dev, unsigned int id)
stx104dev->chip = &stx104gpio->chip;
dev_set_drvdata(dev, stx104dev);
err = gpiochip_add_data(&stx104gpio->chip, stx104gpio);
err = devm_gpiochip_add_data(dev, &stx104gpio->chip, stx104gpio);
if (err) {
dev_err(dev, "GPIO registering failed (%d)\n", err);
return err;
}
err = iio_device_register(indio_dev);
if (err) {
dev_err(dev, "IIO device registering failed (%d)\n", err);
gpiochip_remove(&stx104gpio->chip);
return err;
}
return 0;
}
static int stx104_remove(struct device *dev, unsigned int id)
{
struct stx104_dev *const stx104dev = dev_get_drvdata(dev);
iio_device_unregister(stx104dev->indio_dev);
gpiochip_remove(stx104dev->chip);
return 0;
return devm_iio_device_register(dev, indio_dev);
}
static struct isa_driver stx104_driver = {
@ -370,7 +353,6 @@ static struct isa_driver stx104_driver = {
.driver = {
.name = "stx104"
},
.remove = stx104_remove
};
module_isa_driver(stx104_driver, num_stx104);