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

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Date:   Tue, 17 Jul 2018 01:03:35 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Tejun Heo <tj@...nel.org>, Roger Quadros <rogerq@...com>,
        Naresh Kamboju <naresh.kamboju@...aro.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

* Stephen Rothwell <sfr@...b.auug.org.au> [180717 08:03]:
> Hi Tony,
> 
> On Mon, 16 Jul 2018 23:08:08 -0700 Tony Lindgren <tony@...mide.com> wrote:
> >
> > 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?
> 
> OK, I have reverted that commit from today.  Please let me know when the
> problem is fixed in the libata tree ...

Thanks!

Tony