linux-kernel - Re: [PATCH]: PNP: Increase the value of PNP constant

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Date:	Fri, 16 Nov 2007 17:52:48 +0100
From:	Rene Herman <rene.herman@...access.nl>
To:	Zhao Yakui <yakui.zhao@...el.com>
CC:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	shaohua.li@...el.com, Bjorn Helgaas <bjorn.helgaas@...com>
Subject: Re: [PATCH]: PNP: Increase the value of PNP constant

On 16-11-07 08:39, Zhao Yakui wrote:

> Subject: PNP: Increase the value of PNP constant
> From: Zhao Yakui  <yakui.zhao@...el.com>
> 
> On some systems the number of resources(IO,MEM) returnedy by PNP
> device is greater than the PNP constant, for example motherboard devices. 
> It brings that some resources can't be reserved and resource confilicts.
> This will cause PCI resources are assigned wrongly in some systems, and
> cause hang. This is a regression since we deleted ACPI motherboard
> driver and use PNP system driver.
> 
> Andrew, I thought this is an urgent issue and should be fixed ASAP, and
> this is a good candidate for -stable tree
> 
> Signed-off-by: Li Shaohua <shaohua.li@...el.com>
> Signed-off-by: Zhao Yakui <yakui.zhao@...el.com>
> 
> ---
>  drivers/pnp/pnpacpi/rsparser.c |   18 ++++++++++++++++--
>  include/linux/pnp.h            |    4 ++--
>  2 files changed, 18 insertions(+), 4 deletions(-)
> 
> Index: linux-2.6.24-rc2/include/linux/pnp.h
> ===================================================================
> --- linux-2.6.24-rc2.orig/include/linux/pnp.h
> +++ linux-2.6.24-rc2/include/linux/pnp.h
> @@ -13,8 +13,8 @@
>  #include <linux/errno.h>
>  #include <linux/mod_devicetable.h>
>  
> -#define PNP_MAX_PORT		8
> -#define PNP_MAX_MEM		4
> +#define PNP_MAX_PORT		24
> +#define PNP_MAX_MEM		12

This fairly significantly grows (for example?) a struct pnp_resource_table. 
Are 24 and 12 really sensible?

Rene.
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