tlug: Ethernet Card and SCSI Controller using same IRQ

["Robert J. Bickel" <rob@example.com>]

I am setting up Redhat 4.2 on a new Pentium II.  I have a
Adaptec AHA-2940UW SCSI Adapter and a SMC Etherpower II ethernet
card.  Right now I am having trouble getting the ethernet card
to work correctly.   The SCSI and ethernet card both want
the same IRQ, IRQ 9.

I am using a driver for the Epic chip in the ethernet card called
epic100.  I get the following when I initialize the card:

eth0:  SMC EPIC/100 at 0xf400, IRQ 9, 00:e0:29:10:e2:e4
eth0:  MII transceiver found at address 3.
SIOCSIFFLAGS: Try again

According to the ethernet HOW-TO, this means exactly what
I have.  That is another device is using this IRQ (SCSI).
The HOW-TO says if I can get the other device (SCSI) to let
go of IRQ 9, then I can initialize the ethernet card and
then let the SCSI use IRQ 9 again with no problems.  My problem
is How do I make the SCSI let go of IRQ 9 while I initialize the ethernet
card?

Anybody have any ideas on this?

Rob


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Robert Bickel, Lecturer
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