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igb: display a warning message when SmartSpeed works

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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>
This commit is contained in:
Koki Sanagi 2013-01-16 11:05:53 +00:00 committed by Jeff Kirsher
parent b09186d29e
commit c0ba477807
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/intel/igb/igb_main.c
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@ -3901,6 +3901,7 @@ static void igb_watchdog_task(struct work_struct *work)
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 @@ static void igb_watchdog_task(struct work_struct *work)
(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)) {