why is this needed?

[Marc Balmer <marc%msys.ch@localhost>]

gscpcib(4) in it's current state does not work.  it does not attach  
the GPIO part.  I had to apply the attached diff to make it work, but  
I really wonder why this is needed...
When I leave out the device_t sc_dev part in struct gscpcib_softc,  
i.e. I do not have this structure member, but the rest of the diff,  
then the gpio will attach, but accessing with e.g. 'gpioctl gpio0 6  
set out' will lead to an uvm_map error an beam the machine to the  
eternal hunting grounds... (aka panic).
Something(tm) must be modifying the gscpcib_softc structure in the  
attach routine, around pcibattach().  Setting the sc->sc_gpio_present  
to true, then calling pcibattach(), and after this, sc- 
>sc_gpio_present is not longer true.  I don't want to committ my fix  
right away, I'd really like to understand what is going on here.
hints appreciated...    - Marc Balmer

Attachment: gscpcib_01.diff
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