thermal: rcar: 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>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index 293f8dd9fe0ac5718cc1a789f2cdf77d1a11832d..feb848d595fa10a34cd1efcb9556fefdcc6a3f4d 100644 (file)
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -371,7 +371,7 @@ static irqreturn_t rcar_thermal_irq(int irq, void *data)
 /*
  *             platform functions
  */
-static int rcar_thermal_remove(struct platform_device *pdev)
+static void rcar_thermal_remove(struct platform_device *pdev)
 {
        struct rcar_thermal_common *common = platform_get_drvdata(pdev);
        struct device *dev = &pdev->dev;
@@ -388,8 +388,6 @@ static int rcar_thermal_remove(struct platform_device *pdev)
 
        pm_runtime_put(dev);
        pm_runtime_disable(dev);
-
-       return 0;
 }
 
 static int rcar_thermal_probe(struct platform_device *pdev)
@@ -581,7 +579,7 @@ static struct platform_driver rcar_thermal_driver = {
                .of_match_table = rcar_thermal_dt_ids,
        },
        .probe          = rcar_thermal_probe,
-       .remove         = rcar_thermal_remove,
+       .remove_new     = rcar_thermal_remove,
 };
 module_platform_driver(rcar_thermal_driver);