net/enic: fix calculation of truncated packets

The calculation of truncated packets didn't take into account packet
errors due to the adapter not having buffers, causing both the
ipackets, and imissed counts to be wrong if such errors occurred.  In
order to properly calculate the number of packets truncated, we need
to subtract the count of errors due to no buffers.

Fixes: c44d9f01adf3 ("net/enic: count truncated packets")

Signed-off-by: Nelson Escobar <neescoba@cisco.com>

diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index d117f30..329559a 100644 (file)
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -172,7 +172,8 @@ void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
         * which can make ibytes be slightly higher than it should be.
         */
        rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
-       rx_truncated = rx_packet_errors - stats->rx.rx_errors;
+       rx_truncated = rx_packet_errors - stats->rx.rx_errors -
+               stats->rx.rx_no_bufs;
 
        r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
        r_stats->opackets = stats->tx.tx_frames_ok;