linux-kernel - Re: [PATCH] x86: restrict keyboard io ports reservation to make ipmi driver work

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Message-ID: <86802c440804291502q59fc50faue59988b4787d3458@mail.gmail.com>
Date:	Tue, 29 Apr 2008 15:02:54 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Thomas Gleixner" <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, "Ingo Molnar" <mingo@...e.hu>,
	"Helge Wagner" <Helge.Wagner@...anuc.com>,
	"Peter Zijlstra" <peterz@...radead.org>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] x86: restrict keyboard io ports reservation to make ipmi driver work

On Tue, Apr 29, 2008 at 2:46 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
> From: Helge Wagner <Helge.Wagner@...anuc.com>
>
>  On some of our (single board computer) boards (x86) we are using an
>  IPMI controller that uses I/O ports 0x62 and 0x66 for a KCS (keyboard
>  controller style) IPMI system interface.
>
>  Trying to load the openipmi driver fails, because the ports
>  (0x62/0x66) are reserved for keyboard. keyboard reserves the full
>  range 0x60-0x6F while it doesn't need to.
>
>  Reserve only ports 0x60 and 0x64 for the legacy PS/2 i8042 keyboad
>  controller instead of 0x60-0x6F to allow the openipmi driver to work.
>
>  Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
>  ---
>   arch/x86/kernel/setup_32.c |    7 ++++++-
>   1 file changed, 6 insertions(+), 1 deletion(-)
>
>  Index: linux-2.6/arch/x86/kernel/setup_32.c
>  ===================================================================
>  --- linux-2.6.orig/arch/x86/kernel/setup_32.c
>  +++ linux-2.6/arch/x86/kernel/setup_32.c
>  @@ -127,7 +127,12 @@ static struct resource standard_io_resou
>   }, {
>         .name   = "keyboard",
>         .start  = 0x0060,
>  -       .end    = 0x006f,
>  +       .end    = 0x0060,
>  +       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
>  +}, {
>  +       .name   = "keyboard",
>  +       .start  = 0x0064,
>  +       .end    = 0x0064,
>         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
>   }, {
>         .name   = "dma page reg",
>  --

64 bit need to be fixed too...
        { .name = "keyboard", .start = 0x60, .end = 0x6f,
                .flags = IORESOURCE_BUSY | IORESOURCE_IO },

YH
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