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SubjectRe: powerpc: "IRQ probe failed (0x0)" on powerbook
Benjamin Herrenschmidt <> writes:

> On Sun, 2006-12-10 at 19:45 +1300, Paul Collins wrote:
>> On my PowerBook when booting Linus's tree as of commit af1713e0 I get
>> something like this:
>> [blah blah]
>> ide0: Found Apple UniNorth ATA-6 controller, bus ID 3, irq 0
>> Probing IDE interface ide0...
>> hda: HTS541080G9AT00, ATA DISK drive
>> IRQ probe failed (0x0)
>> IRQ probe failed (0x0)
>> IRQ probe failed (0x0)
>> IRQ probe failed (0x0)
>> And then of course it fails to mount root. No such problem using a
>> kernel built from commit 97be852f of December 2nd.
> I'll investigate tomorrow, looks like irq assignment got broken in a way
> or another for that IDE controller.

Bisection has identified this patch:

commit f90bb153b1493719d18b4529a46ebfe43220ea6c
Author: Benjamin Herrenschmidt <>
Date: Sat Nov 11 17:24:51 2006 +1100

[POWERPC] Make pci_read_irq_line the default


Andreas Schwab, SuSE Labs,
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
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