Add missing check in validation function of 'push VLAN' action.
Action is not allowed for ingress flow rules.

Fixes: 9aee7a8418d4 ("net/mlx5: support push flow action on VLAN header")
Cc: sta...@dpdk.org

Signed-off-by: Dekel Peled <dek...@mellanox.com>
Acked-by: Ori Kam <or...@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index b0d5688..1ed677f 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -1741,6 +1741,12 @@ struct field_modify_info modify_tcp[] = {
 {
        const struct rte_flow_action_of_push_vlan *push_vlan = action->conf;
 
+       if (attr->ingress)
+               return rte_flow_error_set(error, ENOTSUP,
+                                         RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
+                                         NULL,
+                                         "push VLAN action not supported for "
+                                         "ingress");
        if (push_vlan->ethertype != RTE_BE16(RTE_ETHER_TYPE_VLAN) &&
            push_vlan->ethertype != RTE_BE16(RTE_ETHER_TYPE_QINQ))
                return rte_flow_error_set(error, EINVAL,
-- 
1.8.3.1

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