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    SubjectRe: Little console problem in 2.5.30
    On Mon, 19 Aug 2002, Pete Zaitcev wrote:
    > I would appreciate if someone would explain me if the attached patch
    > does the right thing. The problem is that I do not use the framebuffer,
    > and use a serial console. Whenever a legacy /sbin/init tries to
    > open /dev/tty0, the system oopses dereferencing conswitchp in
    > visual_init().

    And this worked before?

    conswitchp must never be NULL, say `conswitchp = &dummy_con;' in your setup.c
    if you have a serial console.

    >From looking at arch/sparc/kernel/setup.c, perhaps you have
    CONFIG_DUMMY_CONSOLE=n?

    > -- Pete
    >
    > diff -ur -X dontdiff linux-2.5.30-sp_pbk/drivers/char/console.c linux-2.5.30-sparc/drivers/char/console.c
    > --- linux-2.5.30-sp_pbk/drivers/char/console.c Thu Aug 1 14:16:34 2002
    > +++ linux-2.5.30-sparc/drivers/char/console.c Sun Aug 18 23:14:20 2002
    > @@ -652,7 +652,7 @@
    >
    > int vc_allocate(unsigned int currcons) /* return 0 on success */
    > {
    > - if (currcons >= MAX_NR_CONSOLES)
    > + if (currcons >= MAX_NR_CONSOLES || conswitchp == NULL)
    > return -ENXIO;
    > if (!vc_cons[currcons].d) {
    > long p, q;

    Gr{oetje,eeting}s,

    Geert

    --
    Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

    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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