gpio: zynq: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
index 324e942c0650bb9f33bc2d14b5e93df228e40801..466e23031afccb956d53d35ed723707487aa4c60 100644 (file)
--- a/drivers/gpio/gpio-zynq.c
+++ b/drivers/gpio/gpio-zynq.c
@@ -1010,7 +1010,7 @@ err_pm_dis:
  *
  * Return: 0 always
  */
-static int zynq_gpio_remove(struct platform_device *pdev)
+static void zynq_gpio_remove(struct platform_device *pdev)
 {
        struct zynq_gpio *gpio = platform_get_drvdata(pdev);
        int ret;
@@ -1022,7 +1022,6 @@ static int zynq_gpio_remove(struct platform_device *pdev)
        clk_disable_unprepare(gpio->clk);
        device_set_wakeup_capable(&pdev->dev, 0);
        pm_runtime_disable(&pdev->dev);
-       return 0;
 }
 
 static struct platform_driver zynq_gpio_driver = {
@@ -1032,7 +1031,7 @@ static struct platform_driver zynq_gpio_driver = {
                .of_match_table = zynq_gpio_of_match,
        },
        .probe = zynq_gpio_probe,
-       .remove = zynq_gpio_remove,
+       .remove_new = zynq_gpio_remove,
 };
 
 module_platform_driver(zynq_gpio_driver);