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    SubjectRe: bug in fbmem.c,
    Hi!

    > I'v traced a little bug in the fbmem code. i don't know if it's the right
    > way to
    > correct it, but on my SX164 alpha this seems to work.
    >
    > before the patch: cat /dev/fb0 > foo end with an execption.
    > after the patch: cat /dev/fb0 > foo ; cat foo > /dev/fb0 work.

    Can you try to
    h = open (/dev/fb0, )
    read(h, 0, 256)
    ? Yes, I want you to read into null. I suspect you need something like
    memcpy_fromio_to_user() which does not actually exist :-).


    > There are others problems with the fbdriver on alpha:
    > mmapping the /dev/fb0 and writing to it give me a *RANDOM* 'PYXIS machine
    > check NOT expected'
    > with no effect on the screen.
    > Maybe someone have an idea?

    > - if (copy_to_user(buf, base_addr+p, copy_size))
    > - return -EFAULT;
    > + memcpy_fromio(buf, base_addr+p, copy_size);

    This is likely not right.

    --
    The best software in life is free (not shareware)! Pavel
    GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+

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