kern/46900: can't receive packets on wm interface

[Taylor R Campbell <campbell+netbsd%mumble.net@localhost>]

>Number:         46900
>Category:       kern
>Synopsis:       can't receive packets on wm interface
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Sep 04 15:35:00 +0000 2012
>Originator:     Taylor R Campbell <campbell+netbsd%mumble.net@localhost>
>Release:        NetBSD 6.99.10
>Organization:
>Environment:
Architecture: amd64
Machine: amd64
>Description:

        I have two on-board wm interfaces, one of which, wm0, is
        somehow shared with a BMC, and the other of which, wm1, does
        not appear to be shared with a BMC although it is hard to rule
        that possibility out.  I can transmit and receive packets on
        wm0, but I can only transmit packets on wm1: on the host with
        wm1, I can see packets going out, but I see no packets coming
        in; on its peer, I can see packets coming out, and I can see
        packets going in, but the packets the peer transmits never
        seems to get there.

wm0 at pci9 dev 0 function 0: Intel i82574L (rev. 0x00)
wm0: interrupting at ioapic0 pin 16
wm0: PCI-Express bus
wm0: 256 word (8 address bits) SPI EEPROM
wm0: Ethernet address 00:25:90:..:..:..
ukphy0 at wm0 phy 1: OUI 0x000ac2, model 0x000b, rev. 1
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 
1000baseT-FDX, auto
...
wm1 at pci10 dev 0 function 0: Intel i82574L (rev. 0x00)
wm1: interrupting at ioapic0 pin 16
wm1: PCI-Express bus
wm1: 256 word (8 address bits) SPI EEPROM
wm1: Ethernet address 00:25:90:..:..:..
ukphy1 at wm1 phy 1: OUI 0x000ac2, model 0x000b, rev. 1
ukphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 
1000baseT-FDX, auto

        I don't think this is a hardware problem because FreeBSD 9.0
        can transmit and receive on both interfaces, although it
        wouldn't surprise me if the brain-damaged crossing of wires
        with the BMC to share ethernet ports is bollocksing the thing
        up.

>How-To-Repeat:

        Try to transmit packets on wm1.  Fail.

>Fix:

        Yes, please!