[PATCH v2] app/testpmd: fix flex parser destroy command

[Gregory Etelson]

The patch separates flex item destruction function implementation.
Setups with installed JSON development library can use any value in
range [0, FLEX_MAX_PARSERS_NUM - 1] as input flex item ID.
In setups without JSON development library flex item destruction
function is resolved to empty stub.

cc: sta...@dpdk.org

Fixes: 2d3d84013508 ("app/testpmd: fix flex item flush")
Signed-off-by: Gregory Etelson <getel...@nvidia.com>
Reviewed-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
---
v2: fix compilation warning on setups without JSON library.
---
 app/test-pmd/cmd_flex_item.c | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/app/test-pmd/cmd_flex_item.c b/app/test-pmd/cmd_flex_item.c
index 78a89c0f8a..63593fd456 100644
--- a/app/test-pmd/cmd_flex_item.c
+++ b/app/test-pmd/cmd_flex_item.c
@@ -20,6 +20,8 @@
 struct flex_item *flex_items[RTE_MAX_ETHPORTS][FLEX_MAX_PARSERS_NUM];
 struct flex_pattern flex_patterns[FLEX_MAX_PATTERNS_NUM];
 
+#ifdef RTE_HAS_JANSSON
+
 static struct flex_item *
 flex_parser_fetch(uint16_t port_id, uint16_t flex_id)
 {
@@ -34,7 +36,6 @@ flex_parser_fetch(uint16_t port_id, uint16_t flex_id)
        return flex_items[port_id][flex_id];
 }
 
-#ifdef RTE_HAS_JANSSON
 static __rte_always_inline bool
 match_strkey(const char *key, const char *pattern)
 {
@@ -368,23 +369,12 @@ flex_item_create(portid_t port_id, uint16_t flex_id, 
const char *filename)
        free(fp);
 }
 
-#else /* RTE_HAS_JANSSON */
-void flex_item_create(__rte_unused portid_t port_id,
-                     __rte_unused uint16_t flex_id,
-                     __rte_unused const char *filename)
-{
-       printf("cannot create flex item - no JSON library configured\n");
-}
-#endif /* RTE_HAS_JANSSON */
-
 void
 flex_item_destroy(portid_t port_id, uint16_t flex_id)
 {
        int ret;
        struct rte_flow_error error;
        struct flex_item *fp = flex_parser_fetch(port_id, flex_id);
-       if (!flex_id)
-               return;
        if (fp == FLEX_PARSER_ERR) {
                printf("Bad parameters: port_id=%u flex_id=%u\n",
                       port_id, flex_id);
@@ -405,6 +395,22 @@ flex_item_destroy(portid_t port_id, uint16_t flex_id)
        }
 }
 
+#else /* RTE_HAS_JANSSON */
+void flex_item_create(__rte_unused portid_t port_id,
+                     __rte_unused uint16_t flex_id,
+                     __rte_unused const char *filename)
+{
+       printf("cannot create flex item - no JSON library configured\n");
+}
+
+void
+flex_item_destroy(__rte_unused portid_t port_id, __rte_unused uint16_t flex_id)
+{
+
+}
+
+#endif /* RTE_HAS_JANSSON */
+
 void
 port_flex_item_flush(portid_t port_id)
 {
-- 
2.34.1