linux-kernel - Re: [REGRESSION] rtc/interface.c: kills suspend-to-ram

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Date:	Mon, 16 Apr 2012 12:45:47 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	Mark Lord <kernel@...savvy.com>
CC:	richard -rw- weinberger <richard.weinberger@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	rtc-linux@...glegroups.com,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Greg Kroah-Hartman <greg@...ah.com>, stable@...r.kernel.org,
	Rabin Vincent <rabin.vincent@...ricsson.com>
Subject: Re: [REGRESSION] rtc/interface.c: kills suspend-to-ram

On 04/16/2012 08:57 AM, Mark Lord wrote:
> On 12-04-16 11:49 AM, richard -rw- weinberger wrote:
>> On Mon, Apr 16, 2012 at 5:42 PM, Mark Lord<kernel@...savvy.com>  wrote:
>>> On 12-04-16 10:23 AM, richard -rw- weinberger wrote:
>>>> On Mon, Apr 16, 2012 at 3:55 PM, Mark Lord<kernel@...savvy.com>  wrote:
>>>>> On 12-04-16 12:36 AM, Mark Lord wrote:
>>>>>> Something recent has killed suspend-to-ram on a number of machines here.
>>>>>> The symptom is that they suspend, but immediately wake up and panic,
>>>>>> with just a black screen so no visible messages to go by.
>>>>>>
>>>>>> The patch below works around the issue -- making things work as they used to work.
>>>>>>
>>>>>> +++ linux/drivers/rtc/interface.c     2012-04-16 00:09:14.105387382 -0400
>>>>>> @@ -773,7 +773,7 @@
>>>>>>        if (!rtc->ops || !rtc->ops->alarm_irq_enable)
>>>>>>                return;
>>>>>>
>>>>>> -     rtc->ops->alarm_irq_enable(rtc->dev.parent, false);
>>>>>> +     //rtc->ops->alarm_irq_enable(rtc->dev.parent, false);  // Kills suspend on ZBOX HD-ID41U
>>>>>>   }
>>>
>>> How about the line above -- that's the commit that breaks things here.
>> Download Linus' GIT tree and use git blame. :-)
> Too steep a learning curve for a casual user.
> But google works:
>
> http://www.mail-archive.com/stable@vger.kernel.org/msg04391.html

Thanks for the report and sorry for the trouble.  I'm trying to 
reproduce this locally. Can you send me your .config?

thanks
-john

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