[test patch] reliable apic lockup with one enable/disable_irq()

I found a sequence that reliably locks up my 82093AA ioapic with just one disable/enable_irq. I've attached a patch for the tulip driver. (tested with a pnic card) * focus cpu must be enabled. * Gerard's mask sequence: disable_irq() only sets IRQ_DISABLED, mask_and_ack masks the ioapic entry if

[test patch] reliable apic lockup with one enable/disable_irq()

I found a sequence that reliably locks up my 82093AA ioapic with just one disable/enable_irq. I've attached a patch for the tulip driver. (tested with a pnic card) * focus cpu must be enabled. * Gerard's mask sequence: disable_irq() only sets IRQ_DISABLED, mask_and_ack masks the ioapic entry if