diff options
Diffstat (limited to 'src/drivers/pc80/rtc/mc146818rtc.c')
| -rw-r--r-- | src/drivers/pc80/rtc/mc146818rtc.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/src/drivers/pc80/rtc/mc146818rtc.c b/src/drivers/pc80/rtc/mc146818rtc.c index 21d3c009fa..42671a94a0 100644 --- a/src/drivers/pc80/rtc/mc146818rtc.c +++ b/src/drivers/pc80/rtc/mc146818rtc.c @@ -175,6 +175,15 @@ static void wait_uip(void) ; } +/* Perform a sanity check of current date and time. */ +static int cmos_date_invalid(void) +{ + struct rtc_time now; + + rtc_get(&now); + return rtc_invalid(&now); +} + /* * If the CMOS is cleared, the rtc_reg has the invalid date. That * hurts some OSes. Even if we don't set USE_OPTION_TABLE, we need @@ -190,11 +199,11 @@ void cmos_check_update_date(void) year = cmos_read(RTC_CLK_YEAR); /* - * TODO: If century is 0xFF, 100% that the CMOS is cleared. - * Other than that, so far rtc_year is the only entry to check - * if the date is valid. + * If century is 0xFF, 100% that the CMOS is cleared. + * In addition, check the sanity of all values and reset the date in case of + * insane values. */ - if (century > 0x99 || year > 0x99) /* Invalid date */ + if (century > 0x99 || year > 0x99 || cmos_date_invalid()) /* Invalid date */ cmos_reset_date(); } |