linux-kernel - Re: [PATCH 4.6 000/121] 4.6.2-stable review

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Date:	Tue, 7 Jun 2016 00:30:06 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Javier Martinez Canillas <javier@....samsung.com>
Cc:	Tyler Baker <tyler.baker@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"kernelci.org bot" <bot@...nelci.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	torvalds@...ux-foundation.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Guenter Roeck <linux@...ck-us.net>, shuah.kh@...sung.com,
	patches@...nelci.org, stable@...r.kernel.org,
	Kevin Hilman <khilman@...libre.com>,
	Matt Hart <matt.hart@...aro.org>
Subject: Re: [PATCH 4.6 000/121] 4.6.2-stable review

On Mon, Jun 06, 2016 at 06:43:47PM -0400, Javier Martinez Canillas wrote:
> On 06/06/2016 06:32 PM, Tyler Baker wrote:

> > I have bisected[1] these two failures down to 5e3ca2b349b1
> > ("regulator: Try to resolve regulators supplies on registration") and
> > confirmed that reverting this patch on top of this stable queue fixes
> > the boot issue.

> I'm not familiar with the apq8016-sbc board or Qualcomm platforms in general
> but this patch is known to cause deadlocks when looking up regulators that
> were not registered via OF. This was an issue on at least some Nvidia boards.

The Qualcomm platforms are running into trouble because the qcom_smd
driver is broken and apparently nobody checks -next works for their
boards since they only noticed after -rc1 in spite of the change having
been in -next for a good few weeks.  You need at least "regulator:
qcom_smd: add list_voltage callback" and "regulator: qcom_smd: add
regulator ops for pm8941 lnldo" from my tree which I didn't send to
Linus yet since we only got them in at the end of last week.  I think
that's probably OK for v4.6 TBH, the platform is fairly incomplete
upstream and the original patch fixes issues for other systems.

> So since this patch made it to stable, commit a21513742308 ("regulator: Fix
> deadlock during regulator registration") [0] should also be included.

Please.

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