PM / devfreq: exynos-ppmu: 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>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
index 56bac4702006a29043f927a0ca50b89eb7448bf4..7002df20a49eef308f5f4d4aa6853e23b510b6cf 100644 (file)
--- a/drivers/devfreq/event/exynos-ppmu.c
+++ b/drivers/devfreq/event/exynos-ppmu.c
@@ -692,18 +692,16 @@ static int exynos_ppmu_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int exynos_ppmu_remove(struct platform_device *pdev)
+static void exynos_ppmu_remove(struct platform_device *pdev)
 {
        struct exynos_ppmu *info = platform_get_drvdata(pdev);
 
        clk_disable_unprepare(info->ppmu.clk);
-
-       return 0;
 }
 
 static struct platform_driver exynos_ppmu_driver = {
        .probe  = exynos_ppmu_probe,
-       .remove = exynos_ppmu_remove,
+       .remove_new = exynos_ppmu_remove,
        .driver = {
                .name   = "exynos-ppmu",
                .of_match_table = exynos_ppmu_id_match,