linux-kernel - Re: [Nouveau] 4.16-rc1: UBSAN warning in nouveau/nvkm/subdev/therm/base.c + oops in nvkm_therm_clkgate

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Date:   Wed, 14 Feb 2018 09:36:33 -0500
From:   Ilia Mirkin <imirkin@...m.mit.edu>
To:     Meelis Roos <mroos@...ux.ee>
Cc:     nouveau <nouveau@...ts.freedesktop.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Ben Skeggs <bskeggs@...hat.com>,
        Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [Nouveau] 4.16-rc1: UBSAN warning in nouveau/nvkm/subdev/therm/base.c
 + oops in nvkm_therm_clkgate_fini

On Wed, Feb 14, 2018 at 9:35 AM, Ilia Mirkin <imirkin@...m.mit.edu> wrote:
> On Wed, Feb 14, 2018 at 9:29 AM, Meelis Roos <mroos@...ux.ee> wrote:
>>> This is 4.16-rc1+todays git on a lowly P4 with NV5, worked fine in 4.15:
>>
>> NV5 in another PC (secondary card in x86-64) made the systrem crash on
>> boot, in nvkm_therm_clkgate_fini.
>
> Mind booting with nouveau.debug=trace? That should hopefully tell us
> more exactly which thing is dying. If you have a cross-compile/distcc
> setup handy, a bisect may be even more useful.

Erm, sorry, nevermind. You even said it -- nvkm_therm_clkgate_fini is
somehow mis-hooked up for NV5 now. A bisect result would still make
the culprit a lot more obvious.