linux-kernel - Re: 4.18.0-rc1-next-20180619 boot failed on beagle board x15

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Date:   Mon, 16 Jul 2018 23:08:08 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Tejun Heo <tj@...nel.org>, Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Roger Quadros <rogerq@...com>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        Tejun Heo <tj@...nel.org>, linux-omap@...r.kernel.org,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>, ssantosh@...nel.org,
        Olof Johansson <olof@...om.net>, Tero Kristo <t-kristo@...com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Samuel Morris <samorris@...mark.com>
Subject: Re: 4.18.0-rc1-next-20180619 boot failed on beagle board x15

Tejun & Stephen,

The following regression is still pending in next, see below.

* Samuel Morris <samorris@...mark.com> [180702 13:35]:
> On Mon, Jul 2, 2018 at 5:32 AM, Tony Lindgren <tony@...mide.com> wrote:
> > Hi,
> >
> > * Roger Quadros <rogerq@...com> [180621 14:56]:
> >> On 21/06/18 17:31, Samuel Morris wrote:
> >> > On Thu, Jun 21, 2018 at 3:58 AM, Roger Quadros <rogerq@...com> wrote:
> >> >> +Rafael
> >> >>
> >> >> On 20/06/18 18:30, Samuel Morris wrote:
> >> >>> On Wed, Jun 20, 2018 at 8:58 AM, Roger Quadros <rogerq@...com> wrote:
> >> >>>> Tony,
> >> >>>>
> >> >>>> On 20/06/18 13:29, Tony Lindgren wrote:
> >> >>>>> Hi,
> >> >>>>>
> >> >>>>> * Naresh Kamboju <naresh.kamboju@...aro.org> [180620 05:55]:
> >> >>>>>> Linux next (4.18.0-rc1-next-20180619) boot failed on beagle board x15.
> >> >>>>>
> >> >>>>> Bisect points to commit aece27a2f01b ("ata: ahci_platform: allow disabling of
> >> >>>>> hotplug to save power").
> >> >>>>>
> >> >>>>> Reverting the patch makes things work again. Any ideas what
> >> >>>>> might be going wrong here? Things clearly idle but then there
> >> >>>>> seems to be some register access with clocks disabled.
> >
> > So this issue is still happening as of next-20180702. Can you guys
> > please revert the commit above while working on a better solution?
> 
> That's fine with me. I'm not very familiar with the process here, does
> this require anything on my end? And would that require the
> accompanying patch to be reverted: "ata: ahci: rpm_put port on
> port_stop to match rpm_get in port_start"? There shouldn't be any
> problem leaving that one in, but I just want to know before submitting
> my next patch set.

Well usually the maintainer just reverts the regression causing
patch in the related branch and that's it.

Stephen, can you please revert in next until we hear back from
Tejun?

Regards,

Tony