[PATCH 3/3] rtc: Skip setting xtime if persisent clock exist

[Feng Tang <feng.tang@intel.com>]

As the timekeeping_init() already initialize the xtime with
read_persistent_clock().

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
---
 drivers/rtc/hctosys.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/rtc/hctosys.c b/drivers/rtc/hctosys.c
index 4aa60d7..2b539cd 100644
--- a/drivers/rtc/hctosys.c
+++ b/drivers/rtc/hctosys.c
@@ -52,6 +52,10 @@ static int __init rtc_hctosys(void)
 		goto err_invalid;
 	}
 
+	/* Skip setting xtime again if persistent clock exist */
+	if (persistent_clock_exist)
+		goto skip_timeset;
+
 	rtc_tm_to_time(&tm, &tv.tv_sec);
 
 	err = do_settimeofday(&tv);
@@ -65,6 +69,7 @@ static int __init rtc_hctosys(void)
 
 err_invalid:
 err_read:
+skip_timeset:
 	rtc_class_close(rtc);
 
 err_open:
-- 
1.7.9.5