These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / net / ethernet / sfc / tx.c

diff --git a/kernel/drivers/net/ethernet/sfc/tx.c b/kernel/drivers/net/ethernet/sfc/tx.c
index aaf2987..67f6afa 100644 (file)
--- a/kernel/drivers/net/ethernet/sfc/tx.c
+++ b/kernel/drivers/net/ethernet/sfc/tx.c
@@ -431,8 +431,20 @@ finish_packet:
        efx_tx_maybe_stop_queue(tx_queue);
 
        /* Pass off to hardware */
-       if (!skb->xmit_more || netif_xmit_stopped(tx_queue->core_txq))
+       if (!skb->xmit_more || netif_xmit_stopped(tx_queue->core_txq)) {
+               struct efx_tx_queue *txq2 = efx_tx_queue_partner(tx_queue);
+
+               /* There could be packets left on the partner queue if those
+                * SKBs had skb->xmit_more set. If we do not push those they
+                * could be left for a long time and cause a netdev watchdog.
+                */
+               if (txq2->xmit_more_available)
+                       efx_nic_push_buffers(txq2);
+
                efx_nic_push_buffers(tx_queue);
+       } else {
+               tx_queue->xmit_more_available = skb->xmit_more;
+       }
 
        tx_queue->tx_packets++;
 
@@ -617,7 +629,8 @@ void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index)
        EFX_BUG_ON_PARANOID(index > tx_queue->ptr_mask);
 
        efx_dequeue_buffers(tx_queue, index, &pkts_compl, &bytes_compl);
-       netdev_tx_completed_queue(tx_queue->core_txq, pkts_compl, bytes_compl);
+       tx_queue->pkts_compl += pkts_compl;
+       tx_queue->bytes_compl += bytes_compl;
 
        if (pkts_compl > 1)
                ++tx_queue->merge_events;
@@ -721,6 +734,7 @@ void efx_init_tx_queue(struct efx_tx_queue *tx_queue)
        tx_queue->read_count = 0;
        tx_queue->old_read_count = 0;
        tx_queue->empty_read_count = 0 | EFX_EMPTY_COUNT_VALID;
+       tx_queue->xmit_more_available = false;
 
        /* Set up TX descriptor ring */
        efx_nic_init_tx(tx_queue);
@@ -746,6 +760,7 @@ void efx_fini_tx_queue(struct efx_tx_queue *tx_queue)
 
                ++tx_queue->read_count;
        }
+       tx_queue->xmit_more_available = false;
        netdev_tx_reset_queue(tx_queue->core_txq);
 }
 
@@ -1301,8 +1316,20 @@ static int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue,
        efx_tx_maybe_stop_queue(tx_queue);
 
        /* Pass off to hardware */
-       if (!skb->xmit_more || netif_xmit_stopped(tx_queue->core_txq))
+       if (!skb->xmit_more || netif_xmit_stopped(tx_queue->core_txq)) {
+               struct efx_tx_queue *txq2 = efx_tx_queue_partner(tx_queue);
+
+               /* There could be packets left on the partner queue if those
+                * SKBs had skb->xmit_more set. If we do not push those they
+                * could be left for a long time and cause a netdev watchdog.
+                */
+               if (txq2->xmit_more_available)
+                       efx_nic_push_buffers(txq2);
+
                efx_nic_push_buffers(tx_queue);
+       } else {
+               tx_queue->xmit_more_available = skb->xmit_more;
+       }
 
        tx_queue->tso_bursts++;
        return NETDEV_TX_OK;