Replace existing resource handling in the driver with managed
device resource, this ensures more consistent error values and
simplifies error paths.
kzalloc -> devm_kzalloc
gpio_request_one -> devm_gpio_request_one
Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
---
drivers/input/keyboard/gpio_keys_polled.c | 87 ++++++++-----------------------
1 file changed, 23 insertions(+), 64 deletions(-)
diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c
index 4e42819..0dce49d 100644
--- a/drivers/input/keyboard/gpio_keys_polled.c
+++ b/drivers/input/keyboard/gpio_keys_polled.c
@@ -109,9 +109,7 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct
struct device_node *node, *pp;
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button *button;
- int error;
- int nbuttons;
- int i;
+ int i, nbuttons;
node = dev->of_node;
if (!node)
@@ -121,12 +119,10 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct
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;
@@ -147,12 +143,11 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct
gpio = of_get_gpio_flags(pp, 0, &flags);
if (gpio < 0) {
- error = gpio;
- if (error != -EPROBE_DEFER)
+ if (gpio != -EPROBE_DEFER)
dev_err(dev,
"Failed to get gpio flags, error: %d\n",
- error);
- goto err_free_pdata;
+ gpio);
+ return ERR_PTR(gpio);
}
button = &pdata->buttons[i++];
@@ -163,8 +158,7 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct
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);
@@ -179,17 +173,10 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct
button->debounce_interval = 5;
}
- if (pdata->nbuttons == 0) {
- error = -EINVAL;
- goto err_free_pdata;
- }
+ if (!pdata->nbuttons)
+ return ERR_PTR(-EINVAL);
return pdata;
-
-err_free_pdata:
- kfree(pdata);
-err_out:
- return ERR_PTR(error);
}
static struct of_device_id gpio_keys_polled_of_match[] = {
@@ -229,24 +216,21 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
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);
+ bdev = devm_kzalloc(&pdev->dev, sizeof(struct gpio_keys_polled_dev) +
+ pdata->nbuttons * sizeof(struct gpio_keys_button_data),
+ 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();
if (!poll_dev) {
dev_err(dev, "no memory for polled device\n");
- error = -ENOMEM;
- goto err_free_bdev;
+ return -ENOMEM;
}
poll_dev->private = bdev;
@@ -279,15 +263,15 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
if (button->wakeup) {
dev_err(dev, DRV_NAME " does not support wakeup\n");
error = -EINVAL;
- goto err_free_gpio;
+ goto err_out;
}
- 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;
+ goto err_out;
}
bdata->can_sleep = gpio_cansleep(gpio);
@@ -307,7 +291,7 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
if (error) {
dev_err(dev, "unable to register polled device, err=%d\n",
error);
- goto err_free_gpio;
+ goto err_out;
}
/* report initial state of the buttons */
@@ -317,45 +301,20 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
return 0;
-err_free_gpio:
- while (--i >= 0)
- gpio_free(pdata->buttons[i].gpio);
-
+err_out:
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;
}
--
1.8.1.5
--
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