Messages in this thread | | | Date | Tue, 3 May 2022 20:46:45 +0100 (BST) | From | "Maciej W. Rozycki" <> | Subject | Re: [PATCH v3] sh: avoid using IRQ0 on SH3/4 |
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On Tue, 3 May 2022, Geert Uytterhoeven wrote:
> > Sounds like it's now outside of the IRQ range allocation, but I can't find where > > that's requested when registering the controller? (What is a "swizzle" anyway?) > > PCI slots have 4 interrupts (#A, #B, #C, #D). In machines with > multiple slots, the interrupts lines are "swizzled", to avoid that all cards > using a single interrupt are mapped to the same host interrupt.
Especially as single-function devices are required to use INTA.
Maciej
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