linux-kernel - Re: [PATCH v1 1/1] thermal: rcar_gen3_thermal: request IRQ after device initialization

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Message-ID: <20190423112408.GA3954@vmlxhi-102.adit-jv.com>
Date:   Tue, 23 Apr 2019 13:24:08 +0200
From:   Eugeniu Rosca <erosca@...adit-jv.com>
To:     Simon Horman <horms@...ge.net.au>
CC:     Jiada Wang <jiada_wang@...tor.com>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Hien Dang <hien.dang.eb@...esas.com>,
        Fabrizio Castro <fabrizio.castro@...renesas.com>,
        Dien Pham <dien.pham.ry@...esas.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Biju Das <biju.das@...renesas.com>,
        "George G. Davis" <george_davis@...tor.com>,
        Joshua Frkuska <joshua_frkuska@...tor.com>,
        Eugeniu Rosca <roscaeugeniu@...il.com>,
        Eugeniu Rosca <erosca@...adit-jv.com>
Subject: Re: [PATCH v1 1/1] thermal: rcar_gen3_thermal: request IRQ after
 device initialization

Hi Simon,

On Tue, Apr 23, 2019 at 12:01:07PM +0200, Simon Horman wrote:
> On Tue, Apr 16, 2019 at 07:48:30PM +0200, Eugeniu Rosca wrote:
> > Hi Jiada,
> > 
> > Adding below people, since they've made recent contributions to the
> > driver and might be interested in your patch:
> > 
> > git log master --since="1 year" -- drivers/thermal/rcar_gen3_thermal.c \
> >     | grep -o "\-by:.*" | sed 's/\-by: //' | sort | uniq -c | sort -rn
> >       7 Eduardo Valentin <edubezval@...il.com>
> >       6 Simon Horman <horms+renesas@...ge.net.au>
> >       5 Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
> >       2 Geert Uytterhoeven <geert+renesas@...der.be>
> >       1 Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
> >       1 Marek Vasut <marek.vasut+renesas@...il.com>
> >       1 Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> >       1 Hien Dang <hien.dang.eb@...esas.com>
> >       1 Fabrizio Castro <fabrizio.castro@...renesas.com>
> >       1 Dien Pham <dien.pham.ry@...esas.com>
> >       1 Daniel Lezcano <daniel.lezcano@...aro.org>
> >       1 Biju Das <biju.das@...renesas.com>
> > 
> > I confirm that loading and unloading the rcar3 thermal driver in a
> > loop produces soft lockup using v5.1-rc5-10-g618d919cae2f on
> > H3-ES2.0-Salvator-X. 
> > 
> > Full log and .config can be found here:
> > https://gist.github.com/erosca/1f76b6dd897cdc39581fca475155e363
> > 
> > I post an excerpt from the above [1] (why not including it in the
> > description?). Also, why not rephrasing the commit summary line in such
> > a way that everybody understands this patch fixes a severe issue, e.g.
> > "thermal: rcar_gen3_thermal: Fix soft lockup on probe" ?
> > 
> > BTW, with this patch applied I left the thermal driver being
> > loaded/unloaded on the target for over one hour w/o seeing the issue
> > reproduced. So, while there might be slight variations in how the final
> > solution looks like, I think the patch already deserves a:
> > 
> > Tested-by: Eugeniu Rosca <erosca@...adit-jv.com>
> > 
> > [1] Soft lockup reproduced with v5.1-rc5-10-g618d919cae2f
> 
> Thanks,
> 
> Unfortunately I do not see the patch in my inbox.
> Would you care to repost it including the following recipients.
> 
> linux-pm@...r.kernel.org
> Zhang Rui <rui.zhang@...el.com>
> Eduardo Valentin <edubezval@...il.com>
> linux-renesas-soc@...r.kernel.org
> Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
> 
> Feel free to include the suggestions made by Eugeniu above and post a v2.

There is a v2 pushed recently:
https://patchwork.kernel.org/cover/10911999/
("[v2,0/2] thermal: rcar_gen3_thermal: fix IRQ issues").

It seems to include both the preparatory work suggested by Daniel
in https://patchwork.kernel.org/patch/10895557/#22592583,
as well as the soft lockup fix itself.

Best regard,
Eugeniu.