ixgbe: fix issue with SFP events with new X550 devices

Add checks for systems that don't have SFP's to avoid incorrectly
acting on interrupts that are falsely interpreted as SFP events.
This also includes a modified check generating the EICR mask to be
more forward-looking.
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -2495,17 +2495,26 @@ static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
 {
 	struct ixgbe_hw *hw = &adapter->hw;
+	u32 eicr_mask = IXGBE_EICR_GPI_SDP2(hw);
 
-	if (eicr & IXGBE_EICR_GPI_SDP2(hw)) {
+	if (!ixgbe_is_sfp(hw))
+		return;
+
+	/* Later MAC's use different SDP */
+	if (hw->mac.type >= ixgbe_mac_X540)
+		eicr_mask = IXGBE_EICR_GPI_SDP0_X540;
+
+	if (eicr & eicr_mask) {
 		/* Clear the interrupt */
-		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2(hw));
+		IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
 		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
 			adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
 			ixgbe_service_event_schedule(adapter);
 		}
 	}
 
-	if (eicr & IXGBE_EICR_GPI_SDP1(hw)) {
+	if (adapter->hw.mac.type == ixgbe_mac_82599EB &&
+	    (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
 		/* Clear the interrupt */
 		IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
 		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {