Re: m68k: Convert to genirq (WIP)

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On Fri, Aug 26, 2011 at 13:21, Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx> wrote:
On Fri, 26 Aug 2011, Geert Uytterhoeven wrote:
On Wed, Aug 10, 2011 at 12:53, Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx> wrote:
via1_irq
    OSS_IRQLEV_VIA1 = IRQ_AUTO_6 (on oss)       conflict: psc_irq

    IRQ_AUTO_1                                  conflict: iop_ism_irq

iop_ism_irq
    OSS_IRQLEV_IOPISM = 1 = IRQ_AUTO_1 (on oss) conflict: via1_irq

via1_irq is remapped to IRQ_AUTO_6 on OSS.

According to via_register_interrupts(), it requests both:

        if (via_alt_mapping) {
                if (request_irq(IRQ_AUTO_1, via1_irq, 0, "software",
                                (void *)via1))
                        pr_err("Couldn't register %s interrupt\n", "software");
                if (request_irq(IRQ_AUTO_6, via1_irq, 0, "via1", (void *)via1))
                        pr_err("Couldn't register %s interrupt\n", "via1");
        } else {
                if (request_irq(IRQ_AUTO_1, via1_irq, 0, "via1", (void *)via1))
                        pr_err("Couldn't register %s interrupt\n", "via1");
        }

Hence IRQ_AUTO_1 must be shared and we cannot use an optimized chain
handler for via1_irq()

I'm pretty sure that the "software" request_irq can be removed. It has
come up before --
http://marc.info/?l=linux-mac68k&m=110973724208746&w=2

Maybe Brad can shed some light on this (?)

I've just cloned and built your m68k-genirq branch. I will run some tests.

Thanks!

nor iop_ism_irq().

via_register_interrupts() is not called on OSS.

You're right, I missed that.

This is the only remaining conflict I see.

Good, I'll convert them all to chain handlers.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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