linux-kernel - Re: MMC/regulator boot hang in -next

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Date:	Mon, 2 Nov 2015 12:50:38 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
Cc:	Sascha Hauer <s.hauer@...gutronix.de>,
	Mark Brown <broonie@...aro.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: MMC/regulator boot hang in -next

On Mon, Nov 2, 2015 at 12:46 PM, Bjorn Andersson
<bjorn.andersson@...ymobile.com> wrote:
> On Mon 02 Nov 11:57 PST 2015, John Stultz wrote:
>
>> Trying to move my nexus7 work to -next, I started seeing boot time
>> hangs. Enabling some debug options provided with a lockdep spew.
>>
>> Reverting "regulator: core: Propagate voltage changes to supply
>> regulators" -  fc42112c0eaa avoids the hang, but I still see lockdep
>> noise.
>>
>> Full log of -next based tree without any reverts follows:
>
> It sure does lock like a deadlock to me. Can you figure out which
> regulator we're talking about here? And confirm that this is 8064 we're
> talking about

Yep. It is an 8064. I'll add some debug messages to figure out which
regulators are having trouble.

thanks
-john
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