From c0ba477807191d04f95057a58e08c88ad27b284c Mon Sep 17 00:00:00 2001
From: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
Date: Wed, 16 Jan 2013 11:05:53 +0000
Subject: [PATCH] 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>
---
drivers/net/ethernet/intel/igb/igb_main.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index b94a3c551d31..93be6eced2e3 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -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)) {
--
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