> -----Original Message-----
> From: Arren Mund [mailto:gandalf@hendrix.stures.iastate.edu]
> Sent: Tuesday, October 30, 2001 5:41 AM
>
> Is there anyway to get two handlers to coexist? basically
> have two kernel
> modules/drivers listening to the same IRQ getting the same
> signals and acting
> appropriately?
>
I don't see why not. (Others more knowledgeable will correct me if I am wrong.)
When you issue request_irq(), be sure that you specify SA_SHIRQ in the flags argument to indicate that the interrupt is shared. I assume that you would issue request_irq(), once from each module, for each handler you want to register. When your device interrupts, both handlers should be called...
See http://www.xml.com/ldd/chapter/book/ch09.html, paying special attention to "Interrupt Sharing".
Harmony,
Christine
