ixgbe: limit setting speed to only one at a time for QSFP modules
QSFP+ modules do not support auto negotiation and should advertise only one speed at a time. This patch adds logic in ethtool to allow setting and reporting the advertised speed at either 1Gbps or 10Gbps, but not both. Also limits the speed set in ixgbe_sfp_link_config_subtask() to highest supported. Previously the link was set to whatever the supported speeds were. Signed-off-by: NEmil Tantilov <emil.s.tantilov@intel.com> Tested-by: NPhil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
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