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;