igb: fix ethtool offline test

A bug was introduced with the following patch:

  Commmit bdbc063129e811264cd6c311d8c2d9b95de01231
  Author: Eric Dumazet <eric.dumazet@gmail.com>
  igb: Add support for byte queue limits.

The ethtool offline tests will cause a perpetual link flap, this
is because the tests also need to account for byte queue limits (BQL).

CC: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by:  Jeff Pieper  <jeffrey.e.pieper@intel.com>

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index aa399a8..e10821a 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -1577,7 +1577,9 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring,
        union e1000_adv_rx_desc *rx_desc;
        struct igb_rx_buffer *rx_buffer_info;
        struct igb_tx_buffer *tx_buffer_info;
+       struct netdev_queue *txq;
        u16 rx_ntc, tx_ntc, count = 0;
+       unsigned int total_bytes = 0, total_packets = 0;
 
        /* initialize next to clean and descriptor values */
        rx_ntc = rx_ring->next_to_clean;
@@ -1601,6 +1603,8 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring,
 
                /* unmap buffer on tx side */
                tx_buffer_info = &tx_ring->tx_buffer_info[tx_ntc];
+               total_bytes += tx_buffer_info->bytecount;
+               total_packets += tx_buffer_info->gso_segs;
                igb_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
 
                /* increment rx/tx next to clean counters */
@@ -1615,6 +1619,9 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring,
                rx_desc = IGB_RX_DESC(rx_ring, rx_ntc);
        }
 
+       txq = netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);
+       netdev_tx_completed_queue(txq, total_packets, total_bytes);
+
        /* re-map buffers to ring, store next to clean values */
        igb_alloc_rx_buffers(rx_ring, count);
        rx_ring->next_to_clean = rx_ntc;