linux-kernel - Re: WARNING: at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4

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Date:   Thu, 27 Aug 2020 16:31:24 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     open list <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        Stephan Gerhold <stephan@...hold.net>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Krzysztof Kozlowski <krzk@...nel.org>, sbhanu@...eaurora.org,
        Sibi Sankar <sibis@...eaurora.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Stephen Boyd <sboyd@...nel.org>, nm@...com
Subject: Re: WARNING: at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4
 - on arm x15

On Thu, 27 Aug 2020 at 15:16, Viresh Kumar <viresh.kumar@...aro.org> wrote:
>
> On 27-08-20, 15:04, Naresh Kamboju wrote:
> > While boot testing arm x15 devices the Kernel warning noticed with linux next
> > tag 20200825.
> >
> > BAD:  next-20200825
> > GOOD:  next-20200824
> >
> > metadata:
> >   git branch: master
> >   git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> >   git commit: 3a00d3dfd4b68b208ecd5405e676d06c8ad6bb63
> >   git describe: next-20200825
> >   make_kernelversion: 5.9.0-rc2
> >   kernel-config:
> > https://builds.tuxbuild.com/LDTu4GFMmvkJspza5LJIjQ/kernel.config
> >
> > We are working on git bisect and boot testing on x15 and get back to you.
>
> Was this working earlier ? But considering that multiple things
> related to OPP broke recently, it may be a OPP core bug as well. Not
> sure though.
>
> Can you give me delta between both the next branches for drivers/opp/
> path ? I didn't get these tags after fetching linux-next.

git log --oneline next-20200824..next-20200825 -- drivers/opp/
b0531b897c9a opp: Set required OPPs in reverse order when scaling down
b11044e5204e opp: Reduce code duplication in _set_required_opps()
c67ba698f5fe opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER
8aaf6264fc7f opp: Remove _dev_pm_opp_find_and_remove_table() wrapper
f3364e17d571 opp: Split out _opp_set_rate_zero()
10b217365b94 opp: Reuse the enabled flag in !target_freq path
72f80ce4ef9b opp: Rename regulator_enabled and use it as status of all resources

- Naresh