The patch adds boundary check for the MAX_GSI_NUM. Same as the update for i386, the patch addresses a problem with ACPI SCI IRQ. The patch corrects the code such that SCI IRQ is skipped and duplicate entry is avoided. The VIA chipset uses 4-bit IRQ register for internal interrupt routing, and therefore cannot handle IRQ numbers assigned to its devices. The patch corrects this problem by allowing PCI IRQs below 16.
Signed-off by: Natalie Protasevich <[EMAIL PROTECTED]> --- diff -puN arch/x86_64/kernel/mpparse.c~irq-pack-x86_64-update arch/x86_64/kernel/mpparse.c --- linux-2.6.13-rc2/arch/x86_64/kernel/mpparse.c~irq-pack-x86_64-update 2005-07-10 01:36:23.628899784 -0700 +++ linux-2.6.13-rc2-root/arch/x86_64/kernel/mpparse.c 2005-07-10 01:36:23.641897808 -0700 @@ -965,8 +965,21 @@ int mp_register_gsi(u32 gsi, int edge_le * due to unused I/O APIC pins. */ int irq = gsi; - gsi = pci_irq++; - gsi_to_irq[irq] = gsi; + if (gsi < MAX_GSI_NUM) { + if (gsi > 15) + gsi = pci_irq++; +#ifdef CONFIG_ACPI_BUS + /* + * Don't assign IRQ used by ACPI SCI + */ + if (gsi == acpi_fadt.sci_int) + gsi = pci_irq++; +#endif + gsi_to_irq[irq] = gsi; + } else { + printk(KERN_ERR "GSI %u is too high\n", gsi); + return gsi; + } } io_apic_set_pci_routing(ioapic, ioapic_pin, gsi, _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/