Hi, All I have a question about the interrupt of IDE controller. There is a regression between 2.6.13 and 2.6.12. More details can be found in the following link: http://bugzilla.kernel.org/show_bug.cgi?id=5637 When the IDE controller works in legacy mode, the default IRQ for Ide0 interface is 14 and IRQ for Ide1 interface is 15. The default interrupt mode for IRQ14/15 is edge/high. If the interrupt of some PCI devices is routed to IRQ14 or 15 and the interrupt mode is switched to Low/Level, an exception will appear.(If the I/O APIC is used as the Interrupt controller, IRQ14/15 nobody cared for. If the I8259 is used as the interrupt controller, maybe some IDE interrupts will be lost). In the Bug 5637: When the system works in acpi mode, there is no PCI interrupt router for IDE pci device in ACPI tables and OS will guess an interrupt for IDE PCI device, which is obtained from IDE PCI configuration space(The IRQ number is 15). OS will register the IRQ 15 using acpi_register_gsi and switch the interrupt mode of IRQ 15 to Low/level. Because the interrupt mode for IRQ 15 is uncorrect, there will be interrupt flood and the system reports: IRQ 15 nobody cared. How to fix this issue? Is IRQ 14/15 always reserved for the IDE device? Thanks. - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
