Messages in this thread | | | Subject | Re: pcmcia oops on 2.6.17-rc[12] | From | Alan Cox <> | Date | Tue, 16 May 2006 02:18:23 +0100 |
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On Llu, 2006-05-15 at 17:18 -0700, Linus Torvalds wrote: > The irq auto-detection should work with shared interrupts, but yes, it > won't _detect_ them if they are already in use (but it's ok with them > becoming shared later). > > That said, true ISA cards obviously won't ever have a shared irq, in any > normal circumstances.
It really isn't that simple. ISAPnP and later ISA cards often allowed the IRQ to be configured at runtime. Drivers doing this depend upon the request_irq failing to decide which interrupt line to assign. The resource management side of exclusive IRQ allocation is for better or worse deeply embedded in the current interrupt design.
Alan
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