e1000e: 82571 SerDes link handle null code word from partner

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SerDes Link detection on certain 82571 mezzanine cards can fail when the
link is forced, the link partner does not recognize forced link and the
link partner sends null code words.  Detect the null code words and return
to auto-negotiation state which causes the link partner to begin responding
with valid code words.  Within a reasonable interval the link will finally
settle as forced by both partners.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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Bruce Allan 2010-11-16 19:50:13 -08:00 • committed by Jeff Kirsher

parent b1d670f10e

commit d478eb44f7

2 changed files with 4 additions and 1 deletions

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4

drivers/net/e1000e/82571.c

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1

drivers/net/e1000e/defines.h

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