linux-kernel - RE: [PATCH v2] alarmtimer: fix unexpected rtc interrupt when system resume from S3

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Message-ID: <alpine.DEB.2.11.1511161848010.3761@nanos>
Date:	Mon, 16 Nov 2015 19:00:48 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Lee, Zhuo-hao" <zhuo-hao.lee@...el.com>
cc:	John Stultz <john.stultz@...aro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"zhuohao.lee82@...il.com" <zhuohao.lee82@...il.com>
Subject: RE: [PATCH v2] alarmtimer: fix unexpected rtc interrupt when system
 resume from S3

On Sat, 14 Nov 2015, Lee, Zhuo-hao wrote:

> (1). alarmtimer create a rtc wake up timer however alarmtimer won't
>      remove that timer if the system wake up earlier

That's hardly a bug. That's a slight incorrectness which needs to be
fixed.

> (2). rtc wake up timer will trigger hpet_rtc_interrupt continuously
> until timer timeout.

> This patch only fixed (1). Fixing (1) can avoid (2).
> However, The (2) is another story which it is not covered by this patch.

And that's the real interesting question. Why is hpet_rtc_interrupt
continously triggered?

Thanks,

	tglx

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