[PATCH v3 7/7] gpio: exar: use devm action for freeing the IDA and drop remove()

Bartosz Golaszewski
2020-11-10T12:34:29Z

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

We can simplify the error path in probe() and drop remove() entirely if
we provide a devm action for freeing the device ID.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
drivers/gpio/gpio-exar.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
index a2d324c513f8..ae3ead033de4 100644
--- a/drivers/gpio/gpio-exar.c
+++ b/drivers/gpio/gpio-exar.c
@@ -111,6 +111,13 @@ static int exar_direction_input(struct gpio_chip *chip, unsigned int offset)
return 0;
}

+static void exar_devm_ida_free(void *data)
+{
+ struct exar_gpio_chip *exar_gpio = data;
+
+ ida_free(&ida_index, exar_gpio->index);
+}
+
static const struct regmap_config exar_regmap_config = {
.name = "exar-gpio",
.reg_bits = 8,
@@ -158,6 +165,10 @@ static int gpio_exar_probe(struct platform_device *pdev)
if (index < 0)
return index;

+ ret = devm_add_action_or_reset(dev, exar_devm_ida_free, exar_gpio);
+ if (ret)
+ return ret;
+
sprintf(exar_gpio->name, "exar_gpio%d", index);
exar_gpio->gpio_chip.label = exar_gpio->name;
exar_gpio->gpio_chip.parent = dev;
@@ -174,29 +185,15 @@ static int gpio_exar_probe(struct platform_device *pdev)

ret = devm_gpiochip_add_data(dev, &exar_gpio->gpio_chip, exar_gpio);
if (ret)
- goto err_destroy;
+ return ret;

platform_set_drvdata(pdev, exar_gpio);

- return 0;
-
-err_destroy:
- ida_free(&ida_index, index);
- return ret;
-}
-
-static int gpio_exar_remove(struct platform_device *pdev)
-{
- struct exar_gpio_chip *exar_gpio = platform_get_drvdata(pdev);
-
- ida_free(&ida_index, exar_gpio->index);
-
return 0;
}

static struct platform_driver gpio_exar_driver = {
.probe = gpio_exar_probe,
- .remove = gpio_exar_remove,
.driver = {
.name = DRIVER_NAME,
},
--
2.29.1