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Date: Fri, 31 May 2019 16:10:19 +0000
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Subject: [dpdk-dev] [Bug 289] mlx5: 100G interface capability not recognized
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https://bugs.dpdk.org/show_bug.cgi?id=3D289

            Bug ID: 289
           Summary: mlx5: 100G interface capability not recognized
           Product: DPDK
           Version: 17.11
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: srinivas.narayan@att.com
  Target Milestone: ---

mlx5_link_update uses the newer ethtool command ETHTOOL_GLINKSETTINGS to
determine interface capabilities but falls back to the older (deprecated)
ETHTOOL_GSET command if the new method fails for any reason. The older meth=
od
only supports reporting of capabilities up to 40G.

However, mlx5_link_update_unlocked_gs can return a failure for a number of
reasons (including the link being down). Using the older method in cases of
transient failure of the method can result in reporting of reduced capabili=
ties
to the application.

The older method (mlx5_link_update_unlocked_gset) should only be invoked if=
 the
newer method returns EOPNOTSUPP.

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