net: ena: bug fix in lost tx packets detection mechanism

[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / amazon / ena / ena_netdev.h

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 8828f1d6dd22bac9cdc8efe8a6a4d3ec11e5a071..88b5e56123381e0d0af17ce723f9e7d993c50cd9 100644 (file)
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -146,7 +146,18 @@ struct ena_tx_buffer {
        u32 tx_descs;
        /* num of buffers used by this skb */
        u32 num_of_bufs;
-       /* Save the last jiffies to detect missing tx packets */
+
+       /* Used for detect missing tx packets to limit the number of prints */
+       u32 print_once;
+       /* Save the last jiffies to detect missing tx packets
+        *
+        * sets to non zero value on ena_start_xmit and set to zero on
+        * napi and timer_Service_routine.
+        *
+        * while this value is not protected by lock,
+        * a given packet is not expected to be handled by ena_start_xmit
+        * and by napi/timer_service at the same time.
+        */
        unsigned long last_jiffies;
        struct ena_com_buf bufs[ENA_PKT_MAX_BUFS];
 } ____cacheline_aligned;
@@ -170,7 +181,6 @@ struct ena_stats_tx {
        u64 napi_comp;
        u64 tx_poll;
        u64 doorbells;
-       u64 missing_tx_comp;
        u64 bad_req_id;
 };