igb: introduce IGB_PTP_OVERFLOW_CHECK flag

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.keller@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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 1e18a9eb16e0..38daaaba0cdb 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 504102ba4bfb..88d367d5a78d 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) {