[dpdk-dev] [PATCH v3] net/i40e: fix Rx statistic inconsistent

[Wei Zhao1 <wei.zhao1@intel.com>]

rx_good_bytes and rx_good_packets statistic is inconsistent when port
stopped,ipackets statistic is minus the discard packets but rx_bytes
statistic not,but i40e has no statistic of discard bytes.So we check
"dev_started" flag, if the port is started we do the statistic work,if
stopped we don't.We can avoid the statistic inconsistent
problem by this way.

Fixes: 9aace75fc82e ("i40e: fix statistics")

Signed-off-by: Wei Zhao1 <wei.zhao1@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index d0aeb70..47ed6e9 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2315,7 +2315,8 @@ i40e_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	unsigned i;
 
 	/* call read registers - updates values, now write them to struct */
-	i40e_read_stats_registers(pf, hw);
+	if (dev->data->dev_started == 1)
+		i40e_read_stats_registers(pf, hw);
 
 	stats->ipackets = pf->main_vsi->eth_stats.rx_unicast +
 			pf->main_vsi->eth_stats.rx_multicast +
@@ -2494,7 +2495,8 @@ i40e_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 	if (n < count)
 		return count;
 
-	i40e_read_stats_registers(pf, hw);
+	if (dev->data->dev_started == 1)
+		i40e_read_stats_registers(pf, hw);
 
 	if (xstats == NULL)
 		return 0;
-- 
2.5.5