IRQ-Routing for 5.3-BETA
msch at snafu.de
Sat Sep 25 09:22:14 PDT 2004
On Saturday 25 September 2004 16:43, Matthias Schuendehuette wrote:
> Hi John,
> On Friday 24 September 2004 21:14, John Baldwin wrote:
> > Umm the list of IRQ numbers is the list of valid IRQs. Your BIOS
> > is _ineded_ buggy. Note that for the IRQ in question it says this:
> > \_SB_.PCI0.LNKA irq 9: [ 1 3 4 5 6 7 10 11 12 14 15]
> > low,level,sharable 0.1.0
> > I.e., I'm using IRQ 9, but 9 is not in the list of valid IRQs which
> > includes 1, 3, 4, 5, 6, 7, 10, 11, 12, 14, and 15. Thus, the
> > kernel believes what your broken BIOS says and throws out IRQ 9 and
> > tries to use IRQ 10 instead, which your BIOS claims is open for use
> > even though you've told it its not. One thing you can try is a
> > patch Nate has to always treat ACPI's interrupt (IRQ 9 usually) as
> > a valid interrupt for the link device to use.
> Umm... this seems to be completely logic.
> I reconfigured my ISDN-Card to use IRQ2/9 (which was more simple than
> I remembered :-) and it works! Shame on me, sometimes it's really too
This really works for FreeBSD 5.3-BETA5 of today, but it works *only*
with IRQ 2/9.
I also tried IRQ 5, which is not used by any other device (a least I
couldn't find any notice about irq5 in the boot -v messages but for
isic0), and this does not work with the same messages as with IRQ 10.
Somehow I have the uncertain feeling that the new IRQ-Routing code has
still some deficencies, at least for ISA-style IRQs...
But it's no longer a severe problem for me, so I can follow RELENG_5
Ciao/BSD - Matthias
Matthias Schuendehuette <msch [at] snafu.de>, Berlin (Germany)
PGP-Key at <pgp.mit.edu> and <wwwkeys.de.pgp.net> ID: 0xDDFB0A5F
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