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Date: Sat, 11 Dec 2004 13:52:12 -0500
From: Jeff Garzik <jgarzik@pobox.com>
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To: "Alan J. Wylie" <alan@wylie.me.uk>
CC: linux-kernel@vger.kernel.org, EC <wingman@waika9.com>,
       Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Subject: Re: 2.4.29-pre1 OOPS early in boot with Intel ICH5 SATA controller
References: <16824.8109.697757.673632@devnull.wylie.me.uk>
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Alan J. Wylie wrote:
> Code;  c01ccd07 <ata_host_add+57/80>
> 00000000 <_EIP>:
> Code;  c01ccd07 <ata_host_add+57/80>   <=====
>    0:   ff 50 50                  call   *0x50(%eax)   <=====
> Code;  c01ccd0a <ata_host_add+5a/80>
>    3:   89 da                     mov    %ebx,%edx
> Code;  c01ccd0c <ata_host_add+5c/80>
>    5:   85 c0                     test   %eax,%eax
> Code;  c01ccd0e <ata_host_add+5e/80>
>    7:   75 12                     jne    1b <_EIP+0x1b>
> Code;  c01ccd10 <ata_host_add+60/80>
>    9:   8b 5c 24 14               mov    0x14(%esp),%ebx
> Code;  c01ccd14 <ata_host_add+64/80>
>    d:   89 d0                     mov    %edx,%eax
> Code;  c01ccd16 <ata_host_add+66/80>
>    f:   8b 74 24 18               mov    0x18(%esp),%esi
> Code;  c01ccd1a <ata_host_add+6a/80>
>   13:   8b 00                     mov    (%eax),%eax

If you are getting an oops there, it looks like your ata_piix driver is 
mismatched from the libata core.  Did you compile them both at the same 
time, from the same source kernel?

The assembly code above is where function ata_host_add in libata-core.c 
calls "ap->ops->port_start", which definitely exists in ata_piix.c.

	Jeff