powerpc: "IRQ probe failed (0x0)" on powerbook

[Andreas Schwab]

Benjamin Herrenschmidt <benh at kernel.crashing.org> 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 <benh at kernel.crashing.org>
Date:   Sat Nov 11 17:24:51 2006 +1100

    [POWERPC] Make pci_read_irq_line the default
    
Andreas.

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Andreas Schwab, SuSE Labs, schwab at suse.de
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