diff options
| author | Riwen Lu <luriwen@kylinos.cn> | 2022-01-06 11:46:09 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2022-01-17 01:50:26 +0300 |
| commit | ff164ae39b82ee483b24579c8e22a13a8ce5bd04 (patch) | |
| tree | 47cf679dcb4c03687c7961a0b13c62ec7ee2e860 | |
| parent | 900ed72c8a190e8c0b87cb17abc645b8ec713011 (diff) | |
| download | linux-ff164ae39b82ee483b24579c8e22a13a8ce5bd04.tar.xz | |
rtc: cmos: Evaluate century appropriate
There's limiting the year to 2069. When setting the rtc year to 2070,
reading it returns 1970. Evaluate century starting from 19 to count the
correct year.
$ sudo date -s 20700106
Mon 06 Jan 2070 12:00:00 AM CST
$ sudo hwclock -w
$ sudo hwclock -r
1970-01-06 12:00:49.604968+08:00
Fixes: 2a4daadd4d3e5071 ("rtc: cmos: ignore bogus century byte")
Signed-off-by: Riwen Lu <luriwen@kylinos.cn>
Acked-by: Eric Wong <e@80x24.org>
Reviewed-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220106084609.1223688-1-luriwen@kylinos.cn
| -rw-r--r-- | drivers/rtc/rtc-mc146818-lib.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-mc146818-lib.c b/drivers/rtc/rtc-mc146818-lib.c index 7f689f1bafc5..ae9f131b43c0 100644 --- a/drivers/rtc/rtc-mc146818-lib.c +++ b/drivers/rtc/rtc-mc146818-lib.c @@ -159,7 +159,7 @@ int mc146818_get_time(struct rtc_time *time) #endif #ifdef CONFIG_ACPI - if (p.century > 20) + if (p.century > 19) time->tm_year += (p.century - 19) * 100; #endif |