[dpdk-dev] [PATCH] net/mlx5: fix zero value check for set tag action

[Wisam Jaddo]

If we allow to have data <xxx> and mask <0x0> we might
hit a zero data value that will not do any effect

Fixes: e554b672aa05 ("net/mlx5: support flow tag")
Cc: viachesl...@mellanox.com
Cc: sta...@dpdk.org

Signed-off-by: Wisam Jaddo <wis...@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index e7278f0..edd0065 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -2160,6 +2160,10 @@ flow_dv_validate_action_set_tag(struct rte_eth_dev *dev,
                return rte_flow_error_set(error, EINVAL,
                                          RTE_FLOW_ERROR_TYPE_ACTION, action,
                                          "zero mask doesn't have any effect");
+       if (!(conf->data & conf->mask))
+               return rte_flow_error_set(error, EINVAL,
+                                       RTE_FLOW_ERROR_TYPE_ACTION, action,
+                                       "zero value has no effect");
        ret = mlx5_flow_get_reg_id(dev, MLX5_APP_TAG, conf->index, error);
        if (ret < 0)
                return ret;
-- 
2.7.4