[tulip] Adaptec ANA-6944A/TX

[Donald Becker]

On Mon, 3 Dec 2001, Erik Heinz wrote:

> > With 2.2 and before, on x86 only, the driver itself hacks the IRQ
> > mapping to work around the common BIOS IRQ mapping bug where PCI chips
> > behind a bus bridge are assigned different IRQs, but the 4 port card is
> > interrupting only on INTA, a single IRQ line.
> > 
> > With 2.4 the PCI subsystem controls the IRQ mapping, and fixes up this
> > common x86 bug.  You can tell that this case has the fix-up implemented
> > because IRQ is the same on all interfaces. 
> 
> This obviously does not work with the Adaptec ANA-6944A/TX or similar
> cards. The problem has been discussed on this list several times but
> I have seen no solution yet.

Please understand the actual problem, not just the symptoms.

The problem is with the 2.4 kernel combined with your specific
motherboard, not the tulip driver or Adaptec card.  An IRQ mapping
problem will occur with any board using the same bus bridge chip, not
just the ANA-6944.

Donald Becker				becker@scyld.com
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Second Generation Beowulf Clusters
Annapolis MD 21403			410-990-9993