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From: Lukas Wunner <lukas@wunner.de>
To: Andy Ritger <aritger@nvidia.com>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: nvidia vgaarb bug (was: Re: Static inline DRM functions calling into GPL-only code)
Date: Wed, 6 Dec 2017 12:24:27 +0100	[thread overview]
Message-ID: <20171206112427.fwqc5lx3aoksb7ex@wunner.de> (raw)
In-Reply-To: <20170412224605.GM10691@prokofiev.nvidia.com>

On Wed, Apr 12, 2017 at 03:46:05PM -0700, Andy Ritger wrote:
> On Tue, Apr 11, 2017 at 09:24:33AM +0200, Lukas Wunner wrote:
> > Sorry to hijack this thread, but there's an egregious, long-standing bug
> > in your driver with regards to vgaarb usage:  nvidia/nv.c calls
> > vga_tryget() but never calls vga_put(), in other words your driver locks
> > legacy VGA I/O but never unlocks it.  This is in the proprietary, non-MIT
> > licensed portion of your driver.
> > 
> > The bug was already reported to Nvidia four years ago:
> > https://devtalk.nvidia.com/default/topic/545560
> > 
> > It causes issues such as deadlocks or inability to control backlight
> > on MacBook Pros, commit 4eebd5a4e726 tried to work around it but
> > introduced more problems.
> > 
> > Could you please look into fixing that bug? Thanks!
> 
> Thanks for pointing that out.  Yes, we'll take a look.

Andy, eight months have passed and this bug is still present in your
latest driver version 387.34.  Could you please provide an ETA for a fix?

Thanks,

Lukas
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      reply	other threads:[~2017-12-06 11:32 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-11  4:14 Static inline DRM functions calling into GPL-only code Nikhil Mahale
2017-04-11  5:52 ` Daniel Vetter
2017-04-11  6:20   ` Daniel Vetter
2017-04-11 15:15     ` James Jones
2017-04-11 16:09       ` Harry Wentland
2017-04-11 16:37         ` James Jones
2017-04-11 17:33           ` Harry Wentland
2017-04-11  7:24 ` nvidia vgaarb bug (was: Re: Static inline DRM functions calling into GPL-only code) Lukas Wunner
2017-04-12 22:46   ` Andy Ritger
2017-12-06 11:24     ` Lukas Wunner [this message]

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