Input: gpio_keys_polled - convert to devm-* API
Replace existing resource handling in the driver with managed device
resources, this ensures more consistent error values and simplifies error
handling paths:
kzalloc -> devm_kzalloc
gpio_request_one -> devm_gpio_request_one
input_allocate_polled_device -> devm_input_allocate_polled_device
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c
index bea53a6..432d363 100644
--- a/drivers/input/keyboard/gpio_keys_polled.c
+++ b/drivers/input/keyboard/gpio_keys_polled.c
@@ -120,12 +120,10 @@
if (nbuttons == 0)
return NULL;
- 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;
@@ -151,7 +149,7 @@
dev_err(dev,
"Failed to get gpio flags, error: %d\n",
error);
- goto err_free_pdata;
+ return ERR_PTR(error);
}
button = &pdata->buttons[i++];
@@ -162,8 +160,7 @@
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);
@@ -178,17 +175,10 @@
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 const struct of_device_id gpio_keys_polled_of_match[] = {
@@ -213,6 +203,7 @@
struct gpio_keys_polled_dev *bdev;
struct input_polled_dev *poll_dev;
struct input_dev *input;
+ size_t size;
int error;
int i;
@@ -228,24 +219,21 @@
if (!pdata->poll_interval) {
dev_err(dev, "missing poll_interval value\n");
- error = -EINVAL;
- goto err_free_pdata;
+ return -EINVAL;
}
- bdev = kzalloc(sizeof(struct gpio_keys_polled_dev) +
- pdata->nbuttons * sizeof(struct gpio_keys_button_data),
- GFP_KERNEL);
+ size = sizeof(struct gpio_keys_polled_dev) +
+ pdata->nbuttons * sizeof(struct gpio_keys_button_data);
+ bdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!bdev) {
dev_err(dev, "no memory for private data\n");
- error = -ENOMEM;
- goto err_free_pdata;
+ return -ENOMEM;
}
- poll_dev = input_allocate_polled_device();
+ poll_dev = devm_input_allocate_polled_device(&pdev->dev);
if (!poll_dev) {
dev_err(dev, "no memory for polled device\n");
- error = -ENOMEM;
- goto err_free_bdev;
+ return -ENOMEM;
}
poll_dev->private = bdev;
@@ -258,7 +246,6 @@
input->name = pdev->name;
input->phys = DRV_NAME"/input0";
- input->dev.parent = &pdev->dev;
input->id.bustype = BUS_HOST;
input->id.vendor = 0x0001;
@@ -277,16 +264,15 @@
if (button->wakeup) {
dev_err(dev, DRV_NAME " does not support wakeup\n");
- error = -EINVAL;
- goto err_free_gpio;
+ return -EINVAL;
}
- error = gpio_request_one(gpio, GPIOF_IN,
- button->desc ?: DRV_NAME);
+ error = devm_gpio_request_one(&pdev->dev, gpio, GPIOF_IN,
+ button->desc ? : DRV_NAME);
if (error) {
dev_err(dev, "unable to claim gpio %u, err=%d\n",
gpio, error);
- goto err_free_gpio;
+ return error;
}
bdata->can_sleep = gpio_cansleep(gpio);
@@ -306,7 +292,7 @@
if (error) {
dev_err(dev, "unable to register polled device, err=%d\n",
error);
- goto err_free_gpio;
+ return error;
}
/* report initial state of the buttons */
@@ -315,52 +301,10 @@
&bdev->data[i]);
return 0;
-
-err_free_gpio:
- while (--i >= 0)
- gpio_free(pdata->buttons[i].gpio);
-
- input_free_polled_device(poll_dev);
-
-err_free_bdev:
- kfree(bdev);
-
-err_free_pdata:
- /* If we have no platform_data, we allocated pdata dynamically. */
- if (!dev_get_platdata(&pdev->dev))
- kfree(pdata);
-
- return error;
-}
-
-static int gpio_keys_polled_remove(struct platform_device *pdev)
-{
- struct gpio_keys_polled_dev *bdev = platform_get_drvdata(pdev);
- const struct gpio_keys_platform_data *pdata = bdev->pdata;
- int i;
-
- input_unregister_polled_device(bdev->poll_dev);
-
- for (i = 0; i < pdata->nbuttons; i++)
- gpio_free(pdata->buttons[i].gpio);
-
- input_free_polled_device(bdev->poll_dev);
-
- /*
- * If we had no platform_data, we allocated pdata dynamically and
- * must free it here.
- */
- if (!dev_get_platdata(&pdev->dev))
- kfree(pdata);
-
- kfree(bdev);
-
- return 0;
}
static struct platform_driver gpio_keys_polled_driver = {
.probe = gpio_keys_polled_probe,
- .remove = gpio_keys_polled_remove,
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,