linux-kernel - Re: [PATCH] pci: don't load acpi

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Message-Id: <20071211204620.6c9acf54.akpm@linux-foundation.org>
Date:	Tue, 11 Dec 2007 20:46:20 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Yinghai Lu <Yinghai.Lu@....COM>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pci: don't load acpi_php when acpi is disabled

On Tue, 11 Dec 2007 20:14:40 -0800 Yinghai Lu <Yinghai.Lu@....COM> wrote:

> [PATCH] pci: don't load acpi_php when acpi is disabled
> 
> when acpi=off and pci=nomsi, don't load acpiphp
> 
> Signed-off-by: Yinghai Lu <yinghai.lu@....com>
> 
> diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
> index c8c2638..84d66ba 100644
> --- a/drivers/pci/hotplug/acpiphp_core.c
> +++ b/drivers/pci/hotplug/acpiphp_core.c
> @@ -392,6 +392,9 @@ static int __init acpiphp_init(void)
>  {
>  	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
>  
> +	if (acpi_pci_disabled)
> +		return 0;
> +
>  	acpiphp_debug = debug;
>  
>  	/* read all the ACPI info from the system */
> @@ -401,6 +404,9 @@ static int __init acpiphp_init(void)
>  
>  static void __exit acpiphp_exit(void)
>  {
> +	if (acpi_pci_disabled)
> +		return 0;
> +
>  	/* deallocate internal data structures etc. */
>  	acpiphp_glue_exit();
>  }

OK, but there is some information missing in your patch descriptions: what
effect do these patches have?  Does the kernel crash without them?  Or is
there no effect at all?  Or something in between?

Thanks.
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