PM / sleep: fix device reference leak in test_suspend

Make sure to drop the reference taken by class_find_device() after
opening the RTC device.

Fixes: 77437fd4e61f (pm: boot time suspend selftest)
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index 084452e34a12..bdff5ed57f10 100644
--- a/kernel/power/suspend_test.c
+++ b/kernel/power/suspend_test.c
@@ -203,8 +203,10 @@ static int __init test_suspend(void)
 
         /* RTCs have initialized by now too ... can we use one? */
         dev = class_find_device(rtc_class, NULL, NULL, has_wakealarm);
-        if (dev)
+        if (dev) {
                 rtc = rtc_class_open(dev_name(dev));
+                put_device(dev);
+        }
         if (!rtc) {
                 printk(warn_no_rtc);
                 return 0;