linux-kernel - Re: 3.14-rc7 crashes in drm ([PATCH] a crash in mga_driver_irq

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Message-ID: <20140323212715.GA22767@rhlx01.hs-esslingen.de>
Date:	Sun, 23 Mar 2014 22:27:15 +0100
From:	Andreas Mohr <andi@...as.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andreas Mohr <andi@...as.de>,
	Mikulas Patocka <mpatocka@...hat.com>,
	David Airlie <airlied@...ux.ie>,
	DRI <dri-devel@...ts.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 3.14-rc7 crashes in drm ([PATCH] a crash in
 mga_driver_irq_uninstall)

On Sun, Mar 23, 2014 at 09:39:16AM -0700, Linus Torvalds wrote:
> On Sun, Mar 23, 2014 at 5:15 AM, Andreas Mohr <andi@...as.de> wrote:
> >
> > which did end up flawless on 3.12.0-rc2+, too
> > (but failed to improve the issue on 3.14.0-rc7+).
> >
> > So, for all intents and purposes, drm infrastructure seems unavoidably
> > (neither dri disable nor libdrm upgrade helps) affected.
> > Does anyone know which change caused that issue?
> > (I'm asking because bisect here would be relatively painful).
> 
> So 3.12-rc2 works. Does 3.13 work? Is this a regression in the current
> 3.14 rc only, or did it happen already in the previous release?

Hmm, given that Mikulas in
https://lkml.org/lkml/2014/2/26/537
offered a diff of linux-3.13.5 files, it truly seems (shock! ack! noo!)
that that indeed may have been a regression at <= 3.13 proper even
(which may pose interesting questions about the level of testing coverage
we still enjoy [not!?] in this hardware area).

Oh well, seems I'll have to prepare/build 3.13 now...

Thanks,

Andreas Mohr
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