[tulip] Adaptec ANA-6944A/TX
Tue Nov 6 17:53:01 2001
On Tue, 6 Nov 2001, Ben Greear wrote:
> Donald Becker wrote:
> > On Tue, 6 Nov 2001, Ron Reed wrote:
> >>Has anyone gotten the ANA-6944A/TX multiport ethernet card to work with
> >>RedHat 7.1? The kernel is 2.4.3-6.
> >>If I try to do anything with the card, it locks the system up tight. The
> >>system is a Gigabyte 6OX motherboard with the latest BIOS (F4) and a P-III
> >>1gHz CPU. Any clues or pointers on this problem?
> > This is very likely an IRQ mapping problem, not a problem with the
> > driver itself.
> I had this same problem on an Adaptec 4-port NIC...
> Which part of code/hardware is responsible for the IRQ mapping?
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. The question is if IRQ11 is
the correct IRQ line...
Donald Becker email@example.com
Scyld Computing Corporation http://www.scyld.com
410 Severn Ave. Suite 210 Second Generation Beowulf Clusters
Annapolis MD 21403 410-990-9993