Messages in this thread | | | Date | Sun, 24 Jul 2005 18:10:45 +0200 | From | Jesper Juhl <> | Subject | Re: IRQ routing problem in 2.6.10-rc2 |
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On 7/24/05, Jan Engelhardt <jengelh@linux01.gwdg.de> wrote: > >> PCI: Using ACPI for IRQ routing > >> ** PCI interrupts are no longer routed automatically. If this > >> ** causes a device to stop working, it is probably because the > >> ** driver failed to call pci_enable_device(). As a temporary > >> ** workaround, the "pci=routeirq" argument restores the old > >> ** behavior. If this argument makes the device work again, > >> ** please email the output of "lspci" to bjorn.helgaas@hp.com > >> ** so I can fix the driver. > >Have you tried the suggestion given "... As a temporary workaround, > >the "pci=routeirq" argument..." ? > >You could also try the pci=noacpi boot option to see if that changes anything. > > Hi, > > and what's the proper fix for pci=routeirq? I got a driver that is only > maintained by myself and would like to fix up the issue. > While I don't /know/ exactely what the proper fix is I'll venture a guess based on the information in the text above : The driver probably doesn't call pci_enable_device(). Quoting the message at bootup time "If this causes a device to stop working, it is probably because the driver failed to call pci_enable_device().". Also, the Kernel Janitors TODO list (http://janitor.kernelnewbies.org/TODO) has this to say about pci_enable_device() : - ALL PCI drivers should call pci_enable_device --before-- reading pdev->irq or pdev->resource[]. irq and resource[] may not have correct values until after PCI hotplug setup occurs at pci_enable_device() time. Many PCI drivers need to be evaluated and checked for this.
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