w1: w1-gpio: 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>
Link: https://lore.kernel.org/r/bd69ccde7395cf4bf63765e29c1ce83834d3669b.1708340114.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c
index 05c67038ed20c35e99ff9bbb6de4a771fdf0c74d..34128e6bbbfaf607726be95d4f5a442fdc7117a7 100644 (file)
--- a/drivers/w1/masters/w1-gpio.c
+++ b/drivers/w1/masters/w1-gpio.c
@@ -141,7 +141,7 @@ static int w1_gpio_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int w1_gpio_remove(struct platform_device *pdev)
+static void w1_gpio_remove(struct platform_device *pdev)
 {
        struct w1_bus_master *master = platform_get_drvdata(pdev);
        struct w1_gpio_ddata *ddata = master->data;
@@ -150,8 +150,6 @@ static int w1_gpio_remove(struct platform_device *pdev)
                gpiod_set_value(ddata->pullup_gpiod, 0);
 
        w1_remove_master_device(master);
-
-       return 0;
 }
 
 static struct platform_driver w1_gpio_driver = {
@@ -160,7 +158,7 @@ static struct platform_driver w1_gpio_driver = {
                .of_match_table = of_match_ptr(w1_gpio_dt_ids),
        },
        .probe = w1_gpio_probe,
-       .remove = w1_gpio_remove,
+       .remove_new = w1_gpio_remove,
 };
 
 module_platform_driver(w1_gpio_driver);