ixgbe: fix ethtool reporting of supported links for SFP modules

This patch resolves an issue where the driver will display incorrect info
for Q/SFP+ modules that were inserted after the driver has been loaded.

This patch adds a call to identify_phy() in ixgbe_get_settings() prior to
calling get_link_capabilities() which needs the PHY data in order to
determine the correct settings.
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c

@@ -160,6 +160,13 @@ static int ixgbe_get_settings(struct net_device *netdev,
 	bool autoneg = false;
 	bool link_up;
 
+	/* SFP type is needed for get_link_capabilities */
+	if (hw->phy.media_type & (ixgbe_media_type_fiber |
+				  ixgbe_media_type_fiber_qsfp)) {
+		if (hw->phy.sfp_type == ixgbe_sfp_type_not_present)
+				hw->phy.ops.identify_sfp(hw);
+	}
+
 	hw->mac.ops.get_link_capabilities(hw, &supported_link, &autoneg);
 
 	/* set the supported link speeds */