PM / sleep: fix device reference leak in test_suspend

commit ceb75787bc75d0a7b88519ab8a68067ac690f55a upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index 084452e34a125ff24da375e6dce25c1224b46310..bdff5ed57f10a5ef57a015856830471422f3918a 100644 (file)
--- 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;