[PATCH v1] clocksource: Unregister subsystem on device registration failure

[Yuho Choi]

init_clocksource_sysfs() registers the clocksource subsystem before
registering the clocksource device. If device_register() fails, the
function returns the error while leaving the subsystem registered.

Unregister the clocksource subsystem on that failure path so the
successful subsystem registration is unwound before returning.

Fixes: d369a5d8fc70 ("clocksource: convert sysdev_class to a regular subsystem")
Signed-off-by: Yuho Choi <dbgh9129@xxxxxxxxx>
---
 kernel/time/clocksource.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index e48c4d379a7c..5a786b3c778c 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -1566,8 +1566,12 @@ static int __init init_clocksource_sysfs(void)
 {
 	int error = subsys_system_register(&clocksource_subsys, NULL);
 
-	if (!error)
-		error = device_register(&device_clocksource);
+	if (error)
+		return error;
+
+	error = device_register(&device_clocksource);
+	if (error)
+		bus_unregister(&clocksource_subsys);
 
 	return error;
 }
-- 
2.43.0