From 7bb633b1a9812a6b9f3e49d0cf17f60a633914e5 Mon Sep 17 00:00:00 2001 From: Guy Shapiro Date: Sun, 29 Jan 2017 11:57:19 +0200 Subject: [PATCH] rtc: snvs: add a missing write sync The clear of the LPTA_EN flag should be synced before writing to the alarm register. Omitting this synchronization creates a race when trying to change existing alarm. Signed-off-by: Guy Shapiro Signed-off-by: Alexandre Belloni --- drivers/rtc/rtc-snvs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c index 0f11c2a228e3..d51b07d620f7 100644 --- a/drivers/rtc/rtc-snvs.c +++ b/drivers/rtc/rtc-snvs.c @@ -184,6 +184,7 @@ static int snvs_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) rtc_tm_to_time(alrm_tm, &time); regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_LPTA_EN, 0); + rtc_write_sync_lp(data); regmap_write(data->regmap, data->offset + SNVS_LPTAR, time); /* Clear alarm interrupt status bit */