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Re: CVS commit: src/sys/dev/pci

On Sun, Jan 23, 2011 at 03:15:07AM +0000, Izumi Tsutsui wrote:
> Module Name:  src
> Committed By: tsutsui
> Date:         Sun Jan 23 03:15:06 UTC 2011
> Modified Files:
>       src/sys/dev/pci: if_nfe.c
> Log Message:
> Pull the following fix from OpenBSD:
> >> Some nfe(4)/rlphy(4) combos don't work, because the PHY responds to all
> >> addresses on the mii bus.  As a countereasure, only attach the first PHY we
> >> encounter.  It is very unlikely we're going to ever see nfe(4) with 
> >> multiple
> >> PHYs.  The same is probably true for any modern NIC.

Not necessarily, sometimes there are 2 PHYs so that they can be switched
over if a cabling fault is detected.

There will also be the systems where the 'internal' PHY isn't used
because of specific (non-standard) media requirements.

I'm also not exactly sure what happens when MII crossover is used to
directly connect 2 MAC units on the same PCB.


David Laight:

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