Change firewire IRQ

Hello,

I have recently discovered that my ethernet card and ohci1394 module are
sharing the same IRQ.

> cat /proc/interrupts
           CPU0 CPU1
  0: 206643198 207718980 IO-APIC-edge timer
  1: 47 78 IO-APIC-edge keyboard
  2: 0 0 XT-PIC cascade
  4: 13231122 13278428 IO-APIC-edge serial
  8: 8 2 IO-APIC-edge rtc
 14: 1558 843 IO-APIC-edge ide0
 16: 25401713 25393421 IO-APIC-level aic7xxx, 3ware Storage
Controller
 17: 1392713 1390644 IO-APIC-level aic7xxx
 18: 389893182 390023790 IO-APIC-level eth0, ohci1394

Its been suggested that this sharing of IRQ's is what causes I/O errors
when backing up data to my firewire drive.

Is there a way to get the firewire card module to load using a different
IRQ using options in the modules.conf file?
What I have read suggests this can't be done for firewire but I would
like find out for sure?

Changing the IRQ for the network card requires me to download a dos
utility from 3com, turn off Plug and play and set the cards IRQ and I am not
even entirely sure if this can be done for onboard NIC's.

I can change the slot in which the firewire PCI card is located as the
easiest solution but
I am just interested to find out if you can do it via the module as this
means downtime for the server.
My bios does not allow me to assign IRQ's to specific PCI slots either.

Many Thanks,

Melinda

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Received on Tue Oct 21 09:07:50 2003