1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 4d2dc17fd31b..bd8de67c17a9 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4167,6 +4167,26 @@ static bool igb_thermal_sensor_event(struct e1000_hw *hw, u32 event)
 }
 
 /**
+ *  igb_check_lvmmc - check for malformed packets received
+ *  and indicated in LVMMC register
+ *  @adapter: pointer to adapter
+ **/
+static void igb_check_lvmmc(struct igb_adapter *adapter)
+{
+        struct e1000_hw *hw = &adapter->hw;
+        u32 lvmmc;
+
+        lvmmc = rd32(E1000_LVMMC);
+        if (lvmmc) {
+                if (unlikely(net_ratelimit())) {
+                        netdev_warn(adapter->netdev,
+                                    "malformed Tx packet detected and dropped, LVMMC:0x%08x\n",
+                                    lvmmc);
+                }
+        }
+}
+
+/**
  *  igb_watchdog - Timer Call-back
  *  @data: pointer to adapter cast into an unsigned long
  **/
@@ -4361,6 +4381,11 @@ static void igb_watchdog_task(struct work_struct *work)
         igb_spoof_check(adapter);
         igb_ptp_rx_hang(adapter);
 
+        /* Check LVMMC register on i350/i354 only */
+        if ((adapter->hw.mac.type == e1000_i350) ||
+            (adapter->hw.mac.type == e1000_i354))
+                igb_check_lvmmc(adapter);
+
         /* Reset the timer */
         if (!test_bit(__IGB_DOWN, &adapter->state)) {
                 if (adapter->flags & IGB_FLAG_NEED_LINK_UPDATE)