misc: vcpu_stall_detector: 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: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/4b964bd133f5af11cabd51a4d8ed95025583eb93.1708508896.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/vcpu_stall_detector.c b/drivers/misc/vcpu_stall_detector.c
index 6479c962da1acef7a5b816825f43be3a5c2ddb67..e2015c87f03fc538db083de55167bef3799d84ca 100644 (file)
--- a/drivers/misc/vcpu_stall_detector.c
+++ b/drivers/misc/vcpu_stall_detector.c
@@ -187,7 +187,7 @@ err:
        return ret;
 }
 
-static int vcpu_stall_detect_remove(struct platform_device *pdev)
+static void vcpu_stall_detect_remove(struct platform_device *pdev)
 {
        int cpu;
 
@@ -195,8 +195,6 @@ static int vcpu_stall_detect_remove(struct platform_device *pdev)
 
        for_each_possible_cpu(cpu)
                stop_stall_detector_cpu(cpu);
-
-       return 0;
 }
 
 static const struct of_device_id vcpu_stall_detect_of_match[] = {
@@ -208,7 +206,7 @@ MODULE_DEVICE_TABLE(of, vcpu_stall_detect_of_match);
 
 static struct platform_driver vcpu_stall_detect_driver = {
        .probe  = vcpu_stall_detect_probe,
-       .remove = vcpu_stall_detect_remove,
+       .remove_new = vcpu_stall_detect_remove,
        .driver = {
                .name           = KBUILD_MODNAME,
                .of_match_table = vcpu_stall_detect_of_match,