Subject: Re: libATA  PATA status report, new patch
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Meelis Roos <mroos@linux.ee>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <20060207084347.54CD01430C@rhn.tartu-labor>
References: <20060207084347.54CD01430C@rhn.tartu-labor>
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Date: Tue, 07 Feb 2006 11:05:34 +0000
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On Maw, 2006-02-07 at 10:43 +0200, Meelis Roos wrote:
> Tried in Qemu with virtual PIIX3. Compiled in PIIX, OLDPIIX, MPIIX and
> Generic. Enabled PATA support for libata in libata.h. Disabled
> everything in ATA/IDE Kconfig menu.
> 
> ata1: PATA max PIO4 cmd 0x1F0 ctl 0x3F6 bmdma 0x0 irq 15
> Unable to handle kernel NULL pointer dereference at virtual address 00000000
>  printing eip:

Very strange trace indeed. I'll take a look at this. At least since it
came from Qemu I should be able to "build" a suitable PC to match yours.

Original Intel PIIX devices are handled by "OLDPIIX" (0x8086, 0x1230).
The later ones by ata_piix. The only oddity I see is that you have no
PCI bus mastering address base assigned (bmdma)

Alan


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