Configuring mlx5 port with 0 rx rings and 1 or more tx rings causes following
error in dev_start:
    net_mlx5: port 1 cannot allocate RSS queue list (0)
    net_mlx5: port 1 reta config failed: Cannot allocate memory
Skip mlx5_dev_configure_rss_reta() when there are no rx rings.

Cc: sta...@dpdk.org
Signed-off-by: Mohsin Shaikh <mohsinsha...@niometrics.com>
---
 drivers/net/mlx5/mlx5_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index d7d3bc7..1d443c1 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -463,7 +463,7 @@ struct ethtool_link_settings {
        unsigned int *rss_queue_arr = NULL;
        unsigned int rss_queue_n = 0;
 
-       if (priv->skip_default_rss_reta)
+       if (priv->skip_default_rss_reta || !rxqs_n)
                return ret;
        rss_queue_arr = rte_malloc("", rxqs_n * sizeof(unsigned int), 0);
        if (!rss_queue_arr) {
-- 
1.8.3.1

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