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SubjectRe: [PATCH 4.19 143/639] rtc: cmos: ignore bogus century byte

> From: Eric Wong <>
> [ Upstream commit 2a4daadd4d3e507138f8937926e6a4df49c6bfdc ]
> Older versions of Libreboot and Coreboot had an invalid value
> (`3' in my case) in the century byte affecting the GM45 in
> the Thinkpad X200. Not everybody's updated their firmwares,
> and Linux <= 4.2 was able to read the RTC without problems,
> so workaround this by ignoring invalid values.

Should it print a warning so that wrong BIOSes are eventually fixed?

Best regards,

(cesky, pictures)
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