[PATCH v2 3/9] net/iavf: fix false success on flow validation

[Anatoly Burakov]

`iavf_parse_engine_validate()` sets an error when validation fails, but
then returns the engine pointer. `iavf_flow_process_filter()` treats a
non-NULL engine as success, so `rte_flow_validate()` can accept an
invalid flow.

Return `NULL` on validation failure and return the engine only after
validation succeeds.

Fixes: ff2d0c345c3b ("net/iavf: support generic flow API")
Cc: sta...@dpdk.org

Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
---
 drivers/net/intel/iavf/iavf_generic_flow.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/intel/iavf/iavf_generic_flow.c 
b/drivers/net/intel/iavf/iavf_generic_flow.c
index 92ca20031c..14242e6ebb 100644
--- a/drivers/net/intel/iavf/iavf_generic_flow.c
+++ b/drivers/net/intel/iavf/iavf_generic_flow.c
@@ -2134,10 +2134,11 @@ iavf_parse_engine_validate(struct iavf_adapter *ad,
                        rte_flow_error_set(error, EINVAL,
                                RTE_FLOW_ERROR_TYPE_HANDLE,
                                NULL, "Validation failed");
-                       break;
+                       return NULL;
                }
+               return engine;
        }
-       return engine;
+       return NULL;
 }
 
 
-- 
2.52.0