# Fwd: powerpc with gigabit card hanging

- From: Segher Boessenkool \<hidden\>
- Date: 2004-09-28 05:46:10 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2004/09/9395015
- Thread: https://ratatoskr.run/linuxppc-dev/2004/09/9395015/t.md

```text
[Whoops, SMTP problem.  Sorry if it's a duplicate now.]

Begin forwarded message:

> From: Segher Boessenkool <redacted>
> Date: 28 september 2004 0:39:32 GMT-05:00
> To: Matt Porter <mporter@kernel.crashing.org>
> Cc: David Gardiner <redacted>, <redacted>
> Subject: Re: powerpc with gigabit card hanging
>
>>> What kernel are you using?
>
> 2.6.whatever, and I've used 2.4 in the past I believe.
>
>>> it's just that the irq's I'm getting for the
>>> gigabit devices are zero (dual gigabit ethernet card) for the 2.6.9-rc2
>>> plus patchs kernel but for the 2.4 series I was getting 12 and 9 as can
>>> be seen below and configuring the devices worked fine.
>
> PCI device IRQs are normally retrieved straight from the PCI device
> itself.  Sounds like a firmware problem (or the bootloader, if that
> sets up the PCI devices for you).
>
>> irqs for PCI devices do not come from the driver, they are platform
>> specific.  If you are having problems with the interrupt reported
>> by xyz PCI driver then that is something wrong with your platform.
>> On pmac, interrupt routing is retrieved from OF.
>
> I believe Linux for PowerMac actually gets the IRQ number straight
> from the device.  Some other routing might be gotten out of the OF
> device-tree, yes.
>
>
> Segher
>
```