On Mon, 24 Apr 2006, Stephen Hemminger wrote:
> I am seeing repeated problems with misconfigured systems that have shared IRQ
> devices configured for edge-triggered. Also, network devices using NAPI won't
> work reliably on edge-triggered IRQ's. The kernel IRQ architecture doesn't
> have sufficient information to detect this at boot time.
> We should fail request_irq() if the SA_SHIRQ but the irq is edge-triggered.
>
> Right now the concept of level vs edge triggered is buried in things like ELCR for old
> PIC, and other stuff for IO-APIC. There is a IRQ_LEVEL flag in the descriptor field
> but nothing sets it or uses it.
>
> Haven't even looked at non i386 arch's but probably even more confusion there.
Well ALL IRQs from the PCI are level so there is no way to misconfigure
it; or have you found some hidden method?
Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.4 on an i686 machine (5592.89 BogoMips).
Warning : 98.36% of all statistics are fiction, book release in April.
_
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