i40e: Driver prints log message on link speed change

This patch makes the driver log link speed change. Before applying the
patch link messages were printed only on state change. Now message is
printed when link is brought up or down and when speed changes.

Change-ID: Ifbee14b4b16c24967450b3cecac6e8351dcc8f74
Signed-off-by: Filip Sadowski <filip.sadowski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e.h

@@ -596,6 +596,7 @@ struct i40e_vsi {
 	u16 veb_idx;		/* index of VEB parent */
 	struct kobject *kobj;	/* sysfs object */
 	bool current_isup;	/* Sync 'link up' logging */
+	enum i40e_aq_link_speed current_speed;	/* Sync link speed logging */
 
 	void *priv;	/* client driver data reference. */
 

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -5225,12 +5225,16 @@ out:
  */
 void i40e_print_link_message(struct i40e_vsi *vsi, bool isup)
 {
+	enum i40e_aq_link_speed new_speed;
 	char *speed = "Unknown";
 	char *fc = "Unknown";
 
-	if (vsi->current_isup == isup)
+	new_speed = vsi->back->hw.phy.link_info.link_speed;
+
+	if ((vsi->current_isup == isup) && (vsi->current_speed == new_speed))
 		return;
 	vsi->current_isup = isup;
+	vsi->current_speed = new_speed;
 	if (!isup) {
 		netdev_info(vsi->netdev, "NIC Link is Down\n");
 		return;