`tm_year` may go up to 299 if the device supports the century bit. Therefore, subtracting may not give us a valid 2-digit number, but modulo does. Co-developed-by: Szentendrei, Tamás <szentendrei.tamas@xxxxxxxxx> Signed-off-by: Szentendrei, Tamás <szentendrei.tamas@xxxxxxxxx> Signed-off-by: Csókás, Bence <csokas.bence@xxxxxxxxx> --- drivers/rtc/rtc-ds1307.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index bdb7b201a160..872e0b679be4 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -359,7 +359,7 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t) regs[DS1307_REG_MONTH] = bin2bcd(t->tm_mon + 1); /* assume 20YY not 19YY */ - tmp = t->tm_year - 100; + tmp = t->tm_year % 100; regs[DS1307_REG_YEAR] = bin2bcd(tmp); if (chip->century_enable_bit) -- 2.34.1
