amd-xgbe: Improve SFP 100Mbps auto-negotiation

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After changing speed to 100Mbps as a result of auto-negotiation (AN),
some 10/100/1000Mbps SFPs indicate a successful link (no faults or loss
of signal), but cannot successfully transmit or receive data.  These
SFPs required an extra auto-negotiation (AN) after the speed change in
order to operate properly.  Add a quirk for these SFPs so that if the
outcome of the AN actually results in changing to a new speed, re-initiate
AN at that new speed.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Tom Lendacky 2018-05-23 11:39:47 -05:00 • committed by David S. Miller

parent e722ec8237

commit 76cce0af85

3 changed files with 50 additions and 34 deletions

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77

drivers/net/ethernet/amd/xgbe/xgbe-mdio.c

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6

drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c

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1

drivers/net/ethernet/amd/xgbe/xgbe.h

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