[net-next 08/15] igb: introduce IGB_PTP_OVERFLOW_CHECK flag

[Jeff Kirsher]

From: Jacob Keller <jacob.e.kel...@intel.com>

Don't continue to use complex MAC type checks for handling various cases
where we have overflow check code. Make this code more obvious by
introducing a flag which is enabled for hardware that needs these
checks.

Signed-off-by: Jacob Keller <jacob.e.kel...@intel.com>
Tested-by: Aaron Brown <aaron.f.br...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/igb/igb.h     |  1 +
 drivers/net/ethernet/intel/igb/igb_ptp.c | 21 ++++++++-------------
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb.h 
b/drivers/net/ethernet/intel/igb/igb.h
index 1e18a9e..38daaab 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -477,6 +477,7 @@ struct igb_adapter {
 
 /* flags controlling PTP/1588 function */
 #define IGB_PTP_ENABLED                BIT(0)
+#define IGB_PTP_OVERFLOW_CHECK BIT(1)
 
 #define IGB_FLAG_HAS_MSI               BIT(0)
 #define IGB_FLAG_DCA_ENABLED           BIT(1)
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c 
b/drivers/net/ethernet/intel/igb/igb_ptp.c
index 504102b..88d367d 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -1067,6 +1067,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
                adapter->cc.shift = IGB_82576_TSYNC_SHIFT;
                /* Dial the nominal frequency. */
                wr32(E1000_TIMINCA, INCPERIOD_82576 | INCVALUE_82576);
+               adapter->ptp_flags |= IGB_PTP_OVERFLOW_CHECK;
                break;
        case e1000_82580:
        case e1000_i354:
@@ -1087,6 +1088,7 @@ void igb_ptp_init(struct igb_adapter *adapter)
                adapter->cc.shift = 0;
                /* Enable the timer functions by clearing bit 31. */
                wr32(E1000_TSAUXC, 0x0);
+               adapter->ptp_flags |= IGB_PTP_OVERFLOW_CHECK;
                break;
        case e1000_i210:
        case e1000_i211:
@@ -1132,7 +1134,9 @@ void igb_ptp_init(struct igb_adapter *adapter)
        } else {
                timecounter_init(&adapter->tc, &adapter->cc,
                                 ktime_to_ns(ktime_get_real()));
+       }
 
+       if (adapter->ptp_flags & IGB_PTP_OVERFLOW_CHECK) {
                INIT_DELAYED_WORK(&adapter->ptp_overflow_work,
                                  igb_ptp_overflow_check);
 
@@ -1169,20 +1173,11 @@ void igb_ptp_init(struct igb_adapter *adapter)
  **/
 void igb_ptp_stop(struct igb_adapter *adapter)
 {
-       switch (adapter->hw.mac.type) {
-       case e1000_82576:
-       case e1000_82580:
-       case e1000_i354:
-       case e1000_i350:
-               cancel_delayed_work_sync(&adapter->ptp_overflow_work);
-               break;
-       case e1000_i210:
-       case e1000_i211:
-               /* No delayed work to cancel. */
-               break;
-       default:
+       if (!(adapter->ptp_flags & IGB_PTP_ENABLED))
                return;
-       }
+
+       if (adapter->ptp_flags & IGB_PTP_OVERFLOW_CHECK)
+               cancel_delayed_work_sync(&adapter->ptp_overflow_work);
 
        cancel_work_sync(&adapter->ptp_tx_work);
        if (adapter->ptp_tx_skb) {
-- 
2.5.5