[dpdk-stable] [PATCH] app/testpmd: fix tunnel offload validation

[Gregory Etelson <getelson@nvidia.com>]

Tunnel offload API allows application to restore packet to
its original form if chain of flows missed after DECAP action.
The main idea of the tunnel offload API was to query port PMD
to provide flow elements - actions or items.
Flow elements supplied by PMD are merged with original flow rule
elements provided by testpmd operator to create a new flow rule,
optimal for PMD, to implement the tunnel offload API.
That flow rule transformation is hidden form testpmd operator and uses
internal testpmd resources.

Current testpmd did not release tunnel offload resources if flow rule
validation failed.

The patch always releases tunnel offload resources after flow rule
validation returns.

Cc: stable@dpdk.org

Fixes: 1b9f274623b8 ("app/testpmd: add commands for tunnel offload")

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
---
 app/test-pmd/config.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index a18871d461..4870aaeba6 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -2011,6 +2011,7 @@ port_flow_validate(portid_t port_id,
 	struct rte_flow_error error;
 	struct port_flow_tunnel *pft = NULL;
 	struct rte_port *port;
+	int ret;
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN) ||
 	    port_id == (portid_t)RTE_PORT_ALL)
@@ -2037,10 +2038,11 @@ port_flow_validate(portid_t port_id,
 		if (pft->actions)
 			actions = pft->actions;
 	}
-	if (rte_flow_validate(port_id, attr, pattern, actions, &error))
-		return port_flow_complain(&error);
+	ret = rte_flow_validate(port_id, attr, pattern, actions, &error);
 	if (tunnel_ops->enabled)
 		port_flow_tunnel_offload_cmd_release(port_id, tunnel_ops, pft);
+	if (ret)
+		return port_flow_complain(&error);
 	printf("Flow rule validated\n");
 	return 0;
 }
-- 
2.33.1