diff options
| -rw-r--r-- | drivers/rtc/rtc-cmos.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index e3fe83a23cf..29cf1457ca1 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -120,7 +120,8 @@ static int cmos_read_alarm(struct device *dev, struct rtc_wkalrm *t) t->time.tm_hour = CMOS_READ(RTC_HOURS_ALARM); if (cmos->day_alrm) { - t->time.tm_mday = CMOS_READ(cmos->day_alrm); + /* ignore upper bits on readback per ACPI spec */ + t->time.tm_mday = CMOS_READ(cmos->day_alrm) & 0x3f; if (!t->time.tm_mday) t->time.tm_mday = -1; |