igb: display a warning message when SmartSpeed works
Current igb driver doesn't tell nothing when Link Speed is downgraded due to
SmartSpeed. As a result, users suspect that there is something wrong with
NIC. If the cause of it is SmartSpeed, there is no means to replace NIC. This
patch make igb notify users that SmartSpeed worked.
Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index b94a3c5..93be6ec 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3901,6 +3901,7 @@
struct igb_adapter,
watchdog_task);
struct e1000_hw *hw = &adapter->hw;
+ struct e1000_phy_info *phy = &hw->phy;
struct net_device *netdev = adapter->netdev;
u32 link;
int i;
@@ -3929,6 +3930,11 @@
(ctrl & E1000_CTRL_RFCE) ? "RX" :
(ctrl & E1000_CTRL_TFCE) ? "TX" : "None");
+ /* check if SmartSpeed worked */
+ igb_check_downshift(hw);
+ if (phy->speed_downgraded)
+ netdev_warn(netdev, "Link Speed was downgraded by SmartSpeed\n");
+
/* check for thermal sensor event */
if (igb_thermal_sensor_event(hw,
E1000_THSTAT_LINK_THROTTLE)) {