[PATCH] PM / sleep: fix device reference leak in test_suspend

[Johan Hovold]

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 <jo...@kernel.org>
---
 kernel/power/suspend_test.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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;
-- 
2.7.3