[PATCH net-next v1 5/9] igc: Avoid TX Hangs because long cycles

[Vinicius Costa Gomes]

Avoid possible TX Hangs caused by using long Qbv cycles. In some
cases, using long cycles (more than 1 second) can cause transmissions
to be blocked for that time. As the TX Hang timeout is close to 1
second, we may need to reduce the cycle time to something more
reasonable: the value chosen is 1ms.

Signed-off-by: Vinicius Costa Gomes <vinicius.go...@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 4 ++--
 drivers/net/ethernet/intel/igc/igc_tsn.c  | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c 
b/drivers/net/ethernet/intel/igc/igc_main.c
index b673ac1199bb..3af54fd9cc0d 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -4692,12 +4692,12 @@ static int igc_save_launchtime_params(struct 
igc_adapter *adapter, int queue,
        if (adapter->base_time)
                return 0;
 
-       adapter->cycle_time = NSEC_PER_SEC;
+       adapter->cycle_time = NSEC_PER_MSEC;
 
        for (i = 0; i < adapter->num_tx_queues; i++) {
                ring = adapter->tx_ring[i];
                ring->start_time = 0;
-               ring->end_time = NSEC_PER_SEC;
+               ring->end_time = NSEC_PER_MSEC;
        }
 
        return 0;
diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c 
b/drivers/net/ethernet/intel/igc/igc_tsn.c
index 38451cf05ac6..f5a5527adb21 100644
--- a/drivers/net/ethernet/intel/igc/igc_tsn.c
+++ b/drivers/net/ethernet/intel/igc/igc_tsn.c
@@ -54,11 +54,11 @@ static int igc_tsn_disable_offload(struct igc_adapter 
*adapter)
 
                wr32(IGC_TXQCTL(i), 0);
                wr32(IGC_STQT(i), 0);
-               wr32(IGC_ENDQT(i), NSEC_PER_SEC);
+               wr32(IGC_ENDQT(i), NSEC_PER_MSEC);
        }
 
-       wr32(IGC_QBVCYCLET_S, NSEC_PER_SEC);
-       wr32(IGC_QBVCYCLET, NSEC_PER_SEC);
+       wr32(IGC_QBVCYCLET_S, NSEC_PER_MSEC);
+       wr32(IGC_QBVCYCLET, NSEC_PER_MSEC);
 
        adapter->flags &= ~IGC_FLAG_TSN_QBV_ENABLED;
 
-- 
2.29.2