Changing IRQ buttignment in Linux 2.6

Cross-posted to comp.os.linux.misc and comp.os.linux.hardware

Hello,

I have a system with several PCI cards. Two of these cards share an IRQ line even though there are free IRQ lines. The system acts in strange ways: refuses to cold boot, halt makes the system reboot, etc.

The manufacturer of the flaky PCI card suggested that we turn off ACPI, or give that PCI card its own IRQ line (i.e. no IRQ sharing).

Here is the current IRQ buttignment:

# catproc-interrupts CPU0 0: 227856 XT-PIC timer 1: 8 XT-PIC i8042 2: 0 XT-PIC cascade 3: 89 XT-PIC serial 4: 1 XT-PIC serial 7: 0 XT-PIC acpi 8: 1 XT-PIC rtc 10: 4 XT-PIC eth2 11: 84 XT-PIC eth0, vw20100 12: 4 XT-PIC eth1 14: 19755 XT-PIC ide0

The driver for the network cards is compiled in the kernel. The driver for the other PCI card is a module.

(Linux version 2.6.14.7)

Adding ether=6,0,eth0 to my boot command does not buttign IRQ 6 to eth0.

I set PnP OS to "No" and "Yes" to no avail.

I could add support for the IO-APIC, but is it not possible to change the IRQ buttignment of a given PCI device?

Regards.

P.S. Here's most of my boot message:

ACPI: bus type pci registered PCI: PCI BIOS revision 2.10 entry at 0xfb210, last bus=3 PCI: Using configuration type 1 ACPI: Subsystem revision 20050902 ACPI: Interpreter enabled ACPI: Using PIC for interrupt routing ACPI: PCI Root Bridge PCI0 (0000:00) PCI: Probing PCI hardware (bus 00) ACPI: buttume root bridge -SB.PCI0 bus is 0 PCI quirk: region 6000-607f claimed by vt82c868 HW-mon PCI quirk: region 5000-500f claimed by vt82c868 SMB ACPI: PCI Interrupt Routing Table -SB.PCI0.PRT ACPI: PCI Interrupt Link LNKA (IRQs 1 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link LNKB (IRQs 1 3 4 5 6 7 10 11 *12 14 15) ACPI: PCI Interrupt Link LNKC (IRQs 1 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link LNKD (IRQs 1 3 4 *5 6 7 10 11 12 14 15) Linux Plug and Play Support v0.97 (c) Adam Belay PCI: Using ACPI for IRQ routing PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report PCI: Bridge: 0000:00:01.0 IO window: disabled. MEM window: disabled. PREFETCH window: disabled. PCI: Bridge: 0000:02:0f.0 IO window: disabled. MEM window: e5300000-e53fffff PREFETCH window: disabled. PCI: Bridge: 0000:00:0d.0 IO window: disabled. MEM window: e5300000-e53fffff PREFETCH window: disabled. PCI: Setting latency timer of device 0000:00:01.0 to 64 eepro100.c:v1.09j-t 9-29-99 Donald Becker eepro100.c: $Revision: 1.36 $ 2000-11-17 Modified by Andrey V. Savochkin ACPI: PCI Interrupt Link LNKA enabled at IRQ 11 PCI: setting IRQ 11 as level-triggered eth0: 0000:00:08.0, 00:30:64:04:E8:32, IRQ 11. Board buttembly 721383-016, Physical connectors present: RJ45 Primary interface chip i82555 PHY #1. General self-test: pbutted. Serial sub-system self-test: pbutted. Internal registers self-test: pbutted. ROM checksum self-test: pbutted (0x04f4518b). ACPI: PCI Interrupt Link LNKB enabled at IRQ 12 PCI: setting IRQ 12 as level-triggered eth1: 0000:00:09.0, 00:30:64:04:E8:33, IRQ 12. Board buttembly 721383-016, Physical connectors present: RJ45 Primary interface chip i82555 PHY #1. General self-test: pbutted. Serial sub-system self-test: pbutted. Internal registers self-test: pbutted. ROM checksum self-test: pbutted (0x04f4518b). ACPI: PCI Interrupt Link LNKC enabled at IRQ 10 PCI: setting IRQ 10 as level-triggered eth2: 0000:00:0a.0, 00:30:64:04:E8:34, IRQ 10. Board buttembly 721383-016, Physical connectors present: RJ45 Primary interface chip i82555 PHY #1. General self-test: pbutted. Serial sub-system self-test: pbutted. Internal registers self-test: pbutted. ROM checksum self-test: pbutted (0x04f4518b).

When the module for the other PCI card is loaded:

vw2010: initmodule() IN vw2010probe0: VW2010 Found... vw2010probe: Found #1 device vw2010: VWmajor = 0xfd or 253 vw2010: initmodule() OUT