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

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On Mon, Jun 06, 2016 at 04:33:14PM -0700, Greg Kroah-Hartman wrote:
> On Mon, Jun 06, 2016 at 06:43:47PM -0400, Javier Martinez Canillas wrote:
> > Hello,
> > 
> > On 06/06/2016 06:32 PM, Tyler Baker wrote:
> > > On 6 June 2016 at 06:55, Kevin Hilman <khilman@xxxxxxxxxxxx> wrote:
> > >> kernelci.org bot <bot@xxxxxxxxxxxx> writes:
> > >>
> > >>> stable-queue boot: 73 boots: 3 failed, 68 passed with 2 offline (v4.6.1-121-g2276ff7d4bf9)
> > >>>
> > >>> Full Boot Summary: https://kernelci.org/boot/all/job/stable-queue/kernel/v4.6.1-121-g2276ff7d4bf9/
> > >>> Full Build Summary: https://kernelci.org/build/stable-queue/kernel/v4.6.1-121-g2276ff7d4bf9/
> > >>>
> > >>> Tree: stable-queue
> > >>> Branch: local/linux-4.6.y.queue
> > >>> Git Describe: v4.6.1-121-g2276ff7d4bf9
> > >>> Git Commit: 2276ff7d4bf9c438832f761ffd525cacf55362cd
> > >>> Git URL: git://server.roeck-us.net/git/linux-stable.git
> > >>> Tested: 28 unique boards, 9 SoC families, 16 builds out of 100
> > >>>
> > >>> Boot Failures Detected: https://kernelci.org/boot/?v4.6.1-121-g2276ff7d4bf9&fail
> > >>>
> > >>> arm64:
> > >>>
> > >>>     defconfig:
> > >>>         apq8016-sbc: 1 failed lab
> > >>>
> > >>>     defconfig+CONFIG_RANDOMIZE_BASE=y:
> > >>>         apq8016-sbc: 1 failed lab
> > >>
> > >> Theses two are real boot regressions, bisections forthcoming.
> > > 
> > > 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.
> > > 
> > > Adding Mark B. and Javier C. to this thread for discussion.
> > >
> > 
> > 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.
> > 
> > So since this patch made it to stable, commit a21513742308 ("regulator: Fix
> > deadlock during regulator registration") [0] should also be included.
> 
> Ugh.  Why wasn't that patch also marked for stable inclusion?  This was
> a problem waiting to happen that could have been totally avoided :(
> 
> I'll queue it up this evening, thanks.

Ok, that patch does not apply to 4.5-stable, or 4.4-stable, so I'm going
to only apply it to 4.6-stable, and drop the original patch,
5e3ca2b349b1 ("regulator: Try to resolve regulators supplies on
registration") from the 4.4 and 4.5 queues.

thanks,

greg k-h
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