of_mdiobus_register_phy() and deferred probe

[Geert Uytterhoeven]

Hi,

Due to a probe deferral of an interrupt controller[1], the Micrel
Ethernet PHY on
r8a7791/koelsch started failing to get its IRQ:

    no irq domain found for /interrupt-controller@e61c0000 !

However, of_mdiobus_register_phy() uses irq_of_parse_and_map(), which plainly
ignores EPROBE_DEFER, and it just continues.

Later I get:

    sh-eth ee700000.ethernet eth0: attached PHY 1 (IRQ -1) to driver
Micrel KSZ8041RNLI

instead of

    sh-eth ee700000.ethernet eth0: attached PHY 1 (IRQ 408) to driver
Micrel KSZ8041RNLI

Ethernet still works, as the interrupt seems to be unneeded(?).

Has anyone already looked into fixing of_mdio to handle deferred probing?

Thanks!

References:
[1] "Re: [PATCH v4 5/5] [RFC] clk: shmobile: r8a7795: Add new CPG/MSSR driver"
     (http://article.gmane.org/gmane.linux.ports.sh.devel/49979)

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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