pch_gbe: ethtool cannot change parameters when link is down

Browse source

When attempting to change e.g. the advertising mask when the link is down
ecmd->speed is -1 causing mii_ethtool_sset() to bail out.

This bug bit when connecting to a gigabit switch through a 4-pin (industrial)
cable, since link negotiation would not complete (both endpoints claimed to
be gigabit-capable, but this is not possible with only 4 pins).
Any attempt to fix this by setting autonegation to not offer 1000Mbps
failed as the setting would not be accepted while the link was still down...

Set ecmd->speed to SPEED_1000 to satisfy mii_ethtool_sset()
(the actual value of ecmd->speed doesn't matter as long as it is valid,
since a re-negotation is forced afterwards).

Signed-off-by: Anders Larsen <al@alarsen.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Anders Larsen 2013-08-18 11:54:40 +02:00 • committed by David S. Miller

parent 0aa857f83f

commit c196ce05cf

1 changed files with 1 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_ethtool.c

View file