linux-kernel - Re: [Linux-fbdev-devel] tty-related oops in latest kernel(s)?

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Date:	Thu, 31 May 2007 09:17:30 +0200 (CEST)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	linux-fbdev-devel@...ts.sourceforge.net
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	linux-kernel@...r.kernel.org,
	Pekka Enberg <penberg@...helsinki.fi>,
	Tero Roponen <teanropo@....fi>,
	Andy Whitcroft <apw@...dowen.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [Linux-fbdev-devel] tty-related oops in latest kernel(s)?

On Thu, 31 May 2007, Antonino A. Daplas wrote:
> On Wed, 2007-05-30 at 22:04 +0400, Alexey Dobriyan wrote:
> > 2) palette in neofb_par is "u32 palette[16];" which is 4x16 = 64 bytes.
> >    struct fb_info::pseudo_palette is assigned to it in neo_alloc_fb_info().
> >    Yet, we check at the beginning of neofb_setcolreg() for color map
> >    length which neofb advertises as 256 which seems too many.
> > 
> 
> Yes, 256 is too many. the pseudo_palette is used for the 16-color
> console only.
> 
> I'm impressed that this bug has escaped notice for this long. That bug
> is present since the 2.5.x era.
> 
> Probably, the best thing to do is hide the pseudo_palette from the
> drivers and move it to the console layer where it belongs to spare
> future driver writers from palette usage confusion. That will be a
> thankless job.

The console layer doesn't know how to fill in the pseudo palette in all
cases, that's why the driver have to do it.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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