Wake-on-LAN on PRO/1000 dual port adapter.

[Paul Burkacki (PBurkacki@symantec.com)]

Hello,

I have a system whose motherboard (Supermicro X5DP8-G2) comes with a
builtin Intel PRO/1000 MT Dual Port Server Adapter (82546EB).  The system
is running RedHat Linux kernel 2.4.18 and the NIC driver is e1000 version
4.4.12.

I am wondering if it is possible to disable WOL on this NIC.  From looking
at the driver code, it's clear that the function e1000_suspend() is the one
that sets up the NIC for what it should do in response to a WOL event.  The
driver writes WUC and WUFC registers with a 0 and then calls
pci_enable_wake() for state 3 and 4 with a 0.  However, this does not seem
to disable WOL.  Namely, even if I force execution of this code path, once
the system shuts down and a magic packet is sent to the NIC, the system
will come up again.

I added some debugging code that dumps contents of the WUC register before
and after it is written with a 0 in the "disable WOL" code path.  It turns
out that WUC seems not to respond to this write.  Specifically, WUC is set
to 0x4 (that's the E1000_WUC_PME_STATUS bit).

Can anyone shed some light on this?

Thanks,
Paul Burkacki

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