linux-kernel - Re: [096/104] rtc: Disable the alarm in the hardware

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Date:	Tue, 3 Jan 2012 08:42:58 -0800
From:	Greg KH <gregkh@...e.de>
To:	Jonathan Nieder <jrnieder@...il.com>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	rtc-linux@...glegroups.com, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	John Stultz <john.stultz@...aro.org>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Rabin Vincent <rabin.vincent@...ricsson.com>,
	"Antonio-M. Corbi Bellot" <antonio.corbi@...es>,
	Marco Santos <marco.santos@...next.com>,
	Christophe Vu-Brugier <cvubrugier@...oo.fr>
Subject: Re: [096/104] rtc: Disable the alarm in the hardware

On Tue, Jan 03, 2012 at 10:27:20AM -0600, Jonathan Nieder wrote:
> Hi Greg,
> 
> Greg KH wrote:
> 
> > 3.1-stable review patch.  If anyone has any objections, please let me know.
> >
> > ------------------
> >
> > From: Rabin Vincent <rabin.vincent@...ricsson.com>
> >
> > commit c0afabd3d553c521e003779c127143ffde55a16f upstream.
> >
> > Currently, the RTC code does not disable the alarm in the hardware.
> >
> > This means that after a sequence such as the one below (the files are in the
> > RTC sysfs), the box will boot up after 2 minutes even though we've
> > asked for the alarm to be turned off.
> [...]
> > Fix this by disabling the alarm when there are no timers to run.
> 
> Seems to cause a regression.  On the affected kernels (e.g., 3.1.5,
> 3.1.6, and 3.2-rc7) the patch has exactly the opposite of what you'd
> expect --- the affected machines automatically power on a few minutes
> after shutdown if and only if the patch is applied.
> 
> The affected machines all seem to be Toshiba Portege laptops.
> 
>  Antonio-M. Corbi Bellot: Toshiba Portege R500
>  Marco Santos: Toshiba Portege Z830
>  Christophe Vu-Brugier: Toshiba Portege R830
> 
> Christophe tried reverting the above patch and the symptoms went away.
> See http://bugs.debian.org/652869 for details.  Please consider
> reverting the patch from stable until this is resolved.

Is it also reverted (or fixed), in Linus's tree as well?

thanks,

greg k-h
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