Re: 2.4.0-test11-pre7: isapnp hang

From: H. Peter Anvin (hpa@zytor.com)
Date: Sun Nov 19 2000 - 20:22:09 EST


Followup to: <E13xfQ1-0003CR-00@the-village.bc.nu>
By author: Alan Cox <alan@lxorguk.ukuu.org.uk>
In newsgroup: linux.dev.kernel
>
> > Try reserving ports 0x300-0x31f on the kernel command line
> > ("reserve=0x300,0x20").
> >
> > I'm surprised isapnp uses a port in such a commonly used range,
> > though.
>
> It seems to be a combination of two bugs. The one I posted a patch for and
> something odd that is taking port 0x279 before the pnp probe is run, which
> suggests a link order issue. Although in truth _nobody_ should be claing
> that anyway
>

It seems to me that it would be better to initialize all the (non-PnP)
ISA cards first, and have them claim their preferred ranges. Now you
can pick the PnP isolate port out of what is left, and also have a
much better idea of what is available.

        -hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
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