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rtc: cmos: Evaluate century appropriate
commit ff164ae upstream. 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: 2a4daad ("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 Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl> # preparation for stable Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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