linux-kernel - Re: [Nouveau] [PATCH v2] vga16fb: refuse to load in face of other driver controlling primary card

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Message-ID: <20100725115424.GA2837@joi.lan>
Date:	Sun, 25 Jul 2010 13:54:24 +0200
From:	Marcin Slusarz <marcin.slusarz@...il.com>
To:	Dave Airlie <airlied@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	nouveau@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Nouveau] [PATCH v2] vga16fb: refuse to load in face of other
 driver controlling primary card

On Sun, Jul 25, 2010 at 06:42:48PM +1000, Dave Airlie wrote:
> On Fri, Jul 23, 2010 at 11:10 PM, Marcin Slusarz
> <marcin.slusarz@...il.com> wrote:
> > On Thu, Jul 22, 2010 at 05:20:39PM -0700, Andrew Morton wrote:
> >> On Tue, 20 Jul 2010 21:19:23 +0200
> >> Marcin Slusarz <marcin.slusarz@...il.com> wrote:
> >>
> >> > We don't want vga16fb to mess with hardware initialized by other driver.
> >> > Detect it and refuse to load.
> >> > It fixes nouveau interrupt storm on some machines.
> 
> Can't we keep this all inside vga16fb? 

That's what v1 did (*), but Andrew didn't like it.

> just have it walk PCI tree
> looking for a primary VGA card, and if it has a driver bound, just
> refuse to bind.
> 
> Dave.

(*) http://lkml.org/lkml/2010/7/20/244

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