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

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszew...@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 <bgolaszew...@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 e4da278f74a2..fda9346d1dc0 100644
--- a/drivers/gpio/gpio-exar.c
+++ b/drivers/gpio/gpio-exar.c
@@ -110,6 +110,13 @@ 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,
@@ -157,6 +164,10 @@ 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;
@@ -173,29 +184,15 @@ 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