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List:       linux-rtc
Subject:    Re: [PATCH 4.19 143/639] rtc: cmos: ignore bogus century byte
From:       Pavel Machek <pavel () denx ! de>
Date:       2020-01-25 12:04:59
Message-ID: 20200125120458.GB14064 () duo ! ucw ! cz
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Hi!

> From: Eric Wong <e@80x24.org>
> 
> [ 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,
								Pavel
								
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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