linux-kernel - Re: [PATCH] [AGPGART] intel_agp: fix stolen mem range on G33

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Message-Id: <20070910221316.d31af0dd.akpm@linux-foundation.org>
Date:	Mon, 10 Sep 2007 22:13:16 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Zhenyu Wang <zhenyu.z.wang@...el.com>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	Dave Airlie <airlied@...ux.ie>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [AGPGART] intel_agp: fix stolen mem range on G33

On Thu, 6 Sep 2007 09:28:52 +0800 Zhenyu Wang <zhenyu.z.wang@...el.com> wrote:

> On 2007.09.05 08:19:37 +0000, Randy Dunlap wrote:
> > *** Remember to use Documentation/SubmitChecklist when testing your code ***
> 
> Thanks Randy. Here's updated patch with typo and tab style
> fixed. I misused x style.
> 
> Subject: [PATCH] [AGPGART] intel_agp: fix stolen mem range on G33
> 
> G33 GTT stolen memory is below graphics data
> stolen memory and be seperate, so don't subtract
> it in stolen mem counting.
> 
> Signed-off-by: Zhenyu Wang <zhenyu.z.wang@...el.com>
> ---
>  drivers/char/agp/intel-agp.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
> index 2c9ca2c..581f922 100644
> --- a/drivers/char/agp/intel-agp.c
> +++ b/drivers/char/agp/intel-agp.c
> @@ -506,6 +506,11 @@ static void intel_i830_init_gtt_entries(void)
>  			break;
>  		}
>  	} else {
> +		/* G33's GTT stolen memory is separate from gfx data
> +		 * stolen memory.
> +		 */
> +		if (IS_G33)
> +			size = 0;
>  		switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
>  		case I855_GMCH_GMS_STOLEN_1M:
>  			gtt_entries = MB(1) - KB(size);

When looking at a "fix" I need to work out whether it might be needed in
2.6.23.  But your description of this patch didn't describe the problem
which it fixes in a way which allows me to decide this.


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