Index: sys/dev/ixgbe/if_ix.c
===================================================================
--- sys/dev/ixgbe/if_ix.c
+++ sys/dev/ixgbe/if_ix.c
@@ -3893,6 +3893,7 @@
 	struct ixgbe_hw *hw = &adapter->hw;
 	int error;
 
+	IXGBE_CORE_LOCK(adapter);
 	error = hw->phy.ops.handle_lasi(hw);
 	if (error == IXGBE_ERR_OVERTEMP)
 		device_printf(adapter->dev,
@@ -3902,6 +3903,7 @@
 		device_printf(adapter->dev,
 		    "Error handling LASI interrupt: %d\n",
 		    error);
+	IXGBE_CORE_UNLOCK(adapter);
 	return;
 }