[PATCH] memif: memif driver does not crashes when there's different N of TX and RX queues

[huzaifa.rahman]

Bugzilla ID: 734

there's a bug in memif_stats_get() function due to confusion
between C2S (client->server) and S2C (server->client) rings,
causing a crash if there's a different number of RX and TX queues.

this is fixed by selectiing the correct rings for RX and TX i.e
for RX, S2C rings are selected and for TX, C2S rings are selected.

Signed-off-by: huzaifa.rahman <huzaifa.rah...@emumba.com>
---
 drivers/net/memif/rte_eth_memif.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/memif/rte_eth_memif.c 
b/drivers/net/memif/rte_eth_memif.c
index dd951b8296..e56df84e10 100644
--- a/drivers/net/memif/rte_eth_memif.c
+++ b/drivers/net/memif/rte_eth_memif.c
@@ -1444,8 +1444,8 @@ memif_stats_get(struct rte_eth_dev *dev, struct 
rte_eth_stats *stats)
        stats->opackets = 0;
        stats->obytes = 0;
 
-       tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_c2s_rings :
-           pmd->run.num_s2c_rings;
+       tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_s2c_rings :
+           pmd->run.num_c2s_rings;
        nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
            RTE_ETHDEV_QUEUE_STAT_CNTRS;
 
@@ -1458,8 +1458,8 @@ memif_stats_get(struct rte_eth_dev *dev, struct 
rte_eth_stats *stats)
                stats->ibytes += mq->n_bytes;
        }
 
-       tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_s2c_rings :
-           pmd->run.num_c2s_rings;
+       tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_c2s_rings :
+           pmd->run.num_s2c_rings;
        nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
            RTE_ETHDEV_QUEUE_STAT_CNTRS;
 
-- 
2.25.1