Red Hat Bugzilla – Bug 39264
first ether card gets eth0-7, second gets eth8-15
Last modified: 2007-04-18 12:33:05 EDT
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Description of problem:
I have two Intel EtherExpress Pro/10 ISA cards. They were detected and
worked fine with the 2.2 kernel, using modprobe for configuration. But
with the 2.4 kernel, the first card is assigned 7 ethernet interfaces
(eth0-eth7). The second card isn't initially detected (although it was on
2.2), but when I run modprobe manually, it detects it and assigns 7
interfaces to it too (eth8-eth15).
Steps to Reproduce:
1. Activate pnp on both cards
2. Manually set the io and irq in modules.conf. here's what I use:
card 1 (assigned eth0-7): io=0x230, IRQ=10
card 2 (assigned eth8-15): io=0x220, IRQ=11
3. Run modprobe for each card
4. Do ifconfig -a and see 16 interfaces
Actual Results: The results from ifconfig show that eth0-eth7 all have
the io and irq of card 1, and eth8-eth15 all have the io and irq of card
Expected Results: eth0 should be assigned to card 1, and eth1 should be
assigned to card 2. no other interfaces should be active.
dmesg shows that the kernel detects each card 8 times with 8 messages that
say "Intel EtherExpress Pro/10 ISA at xxx". This message is from eepro.c
in function eepro_probe1.
I tried to track it down in the source code, and I found a section in
eepro.c (function init_module) that that calls eepro_probe and
register_netdev potentially 8 times per card. But I don't have enough
knowledge of network device drivers to know if that's where the problem is.
Thanks for the report. That function indeed is the problem; it doesn't
even probe for a card before registering the ethX. I've tried to fix it
but as I don't have the hardware I would appriciate it if you would be
willing to test this.
Yes, definitely. Where can I get the code?