net: hns3: add support ethtool extended link state
In order to know the reason of link up failure, add supporting ethtool extended link state. Driver reads the link status code from firmware if in link down state and converts it to ethtool extended link state. Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com> Signed-off-by: NJakub Kicinski <kuba@kernel.org>
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