From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 49151] NULL pointer dereference in pata_acpi
Date: Mon, 22 Oct 2012 20:27:38 +0000 (UTC)
Message-ID: <20121022202738.4AEAE11FB02@bugzilla.kernel.org>
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https://bugzilla.kernel.org/show_bug.cgi?id=3D49151
--- Comment #10 from Borislav Petkov 2012-10-22 20:27:3=
7 ---
On Mon, Oct 22, 2012 at 04:47:52PM +0100, Phillip Wood wrote:
> 00:04.0 IDE interface: ULi Electronics Inc. M5229 IDE (rev c3) (prog-=
if f0)
> Subsystem: Toshiba America Info Systems Device 0004
> Flags: bus master, medium devsel, latency 64, IRQ 255
> [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=3D8]
> [virtual] Memory at 000003f0 (type 3, non-prefetchable)
> [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=3D8]
> [virtual] Memory at 00000370 (type 3, non-prefetchable)
> I/O ports at eff0 [size=3D16]
> Capabilities: [60] Power Management version 2
> Kernel driver in use: pata_ali
Ok, your IDE interface is supported by pata_ali...
[ =E2=80=A6 ]
> If I blacklist pata_acpi and remove it from the initrd image then my
> unpatched distro kernel boots and seems to run fine (I've not checked
> if the hard drive power management is affected though). I've attached
> the dmesg from the patched kernel which was built with a minimal
> config.
Right, as it looks above, pata_ali should be able to support your IDE
interface, so you might not be needing the pata_acpi thing after all.
So yes, blacklisting it and verifying that your system still operates
normally would be something to do. If it does, you could also build a
kernel with pata_acpi disabled (that is, provided you build your own
kernels).
HTH.
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