Input: matrix_keypad - 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/20230920125829.1478827-6-u.kleine-koenig@pengutronix.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c
index a1b037891af25f0b173e5bb35aed03ee1c3d907a..50fa764c82d2b3e9bb0e6670066dd18a7c938a84 100644 (file)
--- a/drivers/input/keyboard/matrix_keypad.c
+++ b/drivers/input/keyboard/matrix_keypad.c
@@ -549,15 +549,13 @@ err_free_mem:
        return err;
 }
 
-static int matrix_keypad_remove(struct platform_device *pdev)
+static void matrix_keypad_remove(struct platform_device *pdev)
 {
        struct matrix_keypad *keypad = platform_get_drvdata(pdev);
 
        matrix_keypad_free_gpio(keypad);
        input_unregister_device(keypad->input_dev);
        kfree(keypad);
-
-       return 0;
 }
 
 #ifdef CONFIG_OF
@@ -570,7 +568,7 @@ MODULE_DEVICE_TABLE(of, matrix_keypad_dt_match);
 
 static struct platform_driver matrix_keypad_driver = {
        .probe          = matrix_keypad_probe,
-       .remove         = matrix_keypad_remove,
+       .remove_new     = matrix_keypad_remove,
        .driver         = {
                .name   = "matrix-keypad",
                .pm     = pm_sleep_ptr(&matrix_keypad_pm_ops),