tty: goldfish: 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/60d0657daf8f4f9e2e3e282941ba542f08dc7f96.1708246007.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index d27979eabfdfbee1397140db3e30f0ee8ab7467c..34421ec06a69e217eab4d0013aa641a0d7b1845d 100644 (file)
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -408,7 +408,7 @@ err_unmap:
        return ret;
 }
 
-static int goldfish_tty_remove(struct platform_device *pdev)
+static void goldfish_tty_remove(struct platform_device *pdev)
 {
        struct goldfish_tty *qtty = platform_get_drvdata(pdev);
 
@@ -424,7 +424,6 @@ static int goldfish_tty_remove(struct platform_device *pdev)
        if (goldfish_tty_current_line_count == 0)
                goldfish_tty_delete_driver();
        mutex_unlock(&goldfish_tty_lock);
-       return 0;
 }
 
 #ifdef CONFIG_GOLDFISH_TTY_EARLY_CONSOLE
@@ -462,7 +461,7 @@ MODULE_DEVICE_TABLE(of, goldfish_tty_of_match);
 
 static struct platform_driver goldfish_tty_platform_driver = {
        .probe = goldfish_tty_probe,
-       .remove = goldfish_tty_remove,
+       .remove_new = goldfish_tty_remove,
        .driver = {
                .name = "goldfish_tty",
                .of_match_table = goldfish_tty_of_match,