[Intel-wired-lan] issue with kernel patch 2a3cdead8b408351fa1e3079b220fa331480ffbc

[Jochen Henneberg <jh@henneberg-systemdesign.com>]

On Mo, 2016-04-25 at 12:35 -0500, Aaron Sierra wrote:
> This is the output that I get from an external I210 device attached to
> a
> Bay Trail SoC:
> 
> igb 0000:02:00.0: added PHC on eth0
> igb 0000:02:00.0: Intel(R) Gigabit Ethernet Network Connection
> igb 0000:02:00.0: eth0: (PCIe:2.5Gb/s:Width x1) 00:17:3c:02:88:56
> igb 0000:02:00.0: eth0: PBA No: FFFFFF-0FF
> igb 0000:02:00.0: Using MSI-X interrupts. 2 rx queue(s), 2 tx queue(s)
> igb: igb_init_phy_params_82575: default page: 0
> igb: igb_init_phy_params_82575: PHY ID: 1410c00

And here is mine with the patch applied:

igb: Intel(R) Gigabit Ethernet Network Driver - version 5.3.0-k
igb: Copyright (c) 2007-2014 Intel Corporation.
igb: igb_init_phy_params_82575: default page: fc
igb: igb_init_phy_params_82575: PHY ID: a0044e90
igb: probe of 0000:01:00.0 failed with error -2
igb: igb_init_phy_params_82575: default page: 0
igb: igb_init_phy_params_82575: PHY ID: 1410c00
pps pps0: new PPS source ptp0
igb 0000:04:00.0: added PHC on eth0
igb 0000:04:00.0: Intel(R) Gigabit Ethernet Network Connection
igb 0000:04:00.0: eth0: (PCIe:2.5Gb/s:Width x1) 00:e0:4b:47:38:6f
igb 0000:04:00.0: eth0: PBA No: FFFFFF-0FF
igb 0000:04:00.0: Using MSI-X interrupts. 2 rx queue(s), 2 tx queue(s)

At PCI 0000:04:00.0 is the BYT NIC, this comes up with the correct page
selection and phy id. Above it (0000:01:00.0) is the external NIC which
comes up with 'anything' (but 'anything' is the same after each power
cycle)!?
Some explanations to the HW setup, the BYT resides on a Kontron nanoETX
board, the external controller is on the custom base board, it is not at
all integrated into the BIOS setup (the BIOS should only take care of
the internal NIC).
The datasheet states that the page selection register should come up
with 0 after power on, but either somebody writes the register up-front
(but who) or this comes from a broken setup in the NVM?

Jochen
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Jochen Henneberg
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