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Re: Legacy PCI interrupt support in PCIe host driver




On 16/03/2017 18:47, Thomas Gleixner wrote:
> On Thu, 16 Mar 2017, Mason wrote:
>> I guess if two interrupts fire at the same time, we'll just take two
>> separate exceptions?
> 
> Wrong guess. That might work with level interrupts, but with other types
> nothing will raise another exception. Sharing interrupts on edge types is a
> stupid idea, but hardware folks insist on implementing stupid ideas.

When you say "That might work with level interrupts",
what is "that" ?

In my case,

	interrupt-map = <0 0 0 1 &irq0 54 IRQ_TYPE_LEVEL_HIGH>;
	interrupts = <54 IRQ_TYPE_LEVEL_HIGH>;

Both ISRs expect LEVEL_HIGH. In fact, doesn't request_irq
return an error if the triggers are different?

Regards.