linux-kernel - NVIDIA Ethernet & invalid MAC

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Message-ID: <4714C66D.4010607@gmail.com>
Date:	Tue, 16 Oct 2007 18:10:53 +0400
From:	Konstantin Kalin <konstantin.kalin@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: NVIDIA Ethernet & invalid MAC

Hello,

Recently we've got some computers with new motherboard having NVidia 
chipset. The motherboard has nforce12 & nforce13 Ethernet cards. I've 
noticed that MAC address is setup random each boot. I debugged the 
driver and found that these cards have right-byte order of MAC address 
but the driver is expecting incorrect byte-order for these models. I 
made hardcode the driver and MAC address became valid. Also I tried  to 
understand that difference in this revision of the chipset. But I 
couldn't find anything interesting. I'm ready continue the investigation 
to do correct changes in the driver but I need an advice.

P.S. It's simple to add DEV_HAS_CORRECT_MACADDR to pci_device_tlb for 
these types of Ethernet. But I think it's not right decision because it 
would break older revisions of these models.

[root@tfm ~]# lspci -vvv
.....
00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a1)
        Subsystem: ASUSTeK Computer Inc. Unknown device 816a
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- 
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0 (250ns min, 5000ns max)
        Interrupt: pin A routed to IRQ 201
        Region 0: Memory at fe02b000 (32-bit, non-prefetchable) [size=4K]
        Region 1: I/O ports at c800 [size=8]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA 
PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable+ DSel=0 DScale=0 PME-
........
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