The selection flags for the RX hash define how the received packets will
be distributed between multiple queues. 
When creating a new TIR, the queue_num is set to 1 if non of the selection 
flags is set.

Applied the same to the RSS desc before checking if it matches a cached 
TIR object to save creating a new object every time.

Fixes: fabf8a37241c ("net/mlx5: fix shared RSS action release")
Cc: stable@dpdk.org

Signed-off-by: Lior Margalit <redacted>
Acked-by: Matan Azrad <redacted>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index fe922b6fbe..4aac69028f 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c

@@ -10985,6 +10985,8 @@ flow_dv_hrxq_prepare(struct rte_eth_dev *dev,
 	rss_desc->hash_fields = dev_flow->hash_fields;
 	rss_desc->tunnel = !!(dh->layers & MLX5_FLOW_LAYER_TUNNEL);
 	rss_desc->shared_rss = 0;
+	if (rss_desc->hash_fields == 0)
+		rss_desc->queue_num = 1;
 	*hrxq_idx = mlx5_hrxq_get(dev, rss_desc);
 	if (!*hrxq_idx)
 		return NULL;

-- 
2.25.1