Re: Unloading drivers, start-up, shut-down and a rewrite (a problem)

[David Hinds <dhinds@sonic.net>]

On Fri, Oct 05, 2001 at 03:58:58PM +1000, Keith Owens wrote:
> 
> Before I write the code, what needs to change in user space to match
> the new semantics?  Every device activation and inactivation must
> adjust the use count of the supporting module.  That is easy for
> hotplug but what about PCMCIA and fixed devices?  In particular
> ifconfig eth0 up must adjust the use count of the module controlling
> eth0.  A partial solution that only works for hotplug is not a good
> idea.  Can we get a consistent user space framework for the new
> semantics?

Just so you know, and not saying whether it is a better or worse
solution, the way PCMCIA drivers handle this, is that there's a
separate interface, /proc/bus/pccard/drivers, that has "use counts"
for PCMCIA drivers that indicate how many physical devices are
currently associated with each driver.  These use counts are
independent of the regular module use counts.

-- Dave

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