Re: [Bug 49151] New: NULL pointer dereference in pata_acpi

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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=8]
> 	[virtual] Memory at 000003f0 (type 3, non-prefetchable)
> 	[virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
> 	[virtual] Memory at 00000370 (type 3, non-prefetchable)
> 	I/O ports at eff0 [size=16]
> 	Capabilities: [60] Power Management version 2
> 	Kernel driver in use: pata_ali

Ok, your IDE interface is supported by pata_ali...

[ … ]

> 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.

-- 
Regards/Gruss,
    Boris.
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