perf: arm-ccn: 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/1cae5f0c4693333c91d28a09388bdb8bfcc25d0b.1702648124.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c
index 728d13d8e98ac9114733ea7ce5745cd118bb626f..641471bd5eff4010e2124e28ff8a7b4f628fed98 100644 (file)
--- a/drivers/perf/arm-ccn.c
+++ b/drivers/perf/arm-ccn.c
@@ -1515,13 +1515,11 @@ static int arm_ccn_probe(struct platform_device *pdev)
        return arm_ccn_pmu_init(ccn);
 }
 
-static int arm_ccn_remove(struct platform_device *pdev)
+static void arm_ccn_remove(struct platform_device *pdev)
 {
        struct arm_ccn *ccn = platform_get_drvdata(pdev);
 
        arm_ccn_pmu_cleanup(ccn);
-
-       return 0;
 }
 
 static const struct of_device_id arm_ccn_match[] = {
@@ -1539,7 +1537,7 @@ static struct platform_driver arm_ccn_driver = {
                .suppress_bind_attrs = true,
        },
        .probe = arm_ccn_probe,
-       .remove = arm_ccn_remove,
+       .remove_new = arm_ccn_remove,
 };
 
 static int __init arm_ccn_init(void)