kvargs: fix freeing behaviour for null

By convention free() functions should ignore NULL parameter. This patch
add this behaviour for rte_kvargs_free().

Signed-off-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_kvargs/rte_kvargs.c b/lib/librte_kvargs/rte_kvargs.c
index 8bc1e46..c2dd051 100644 (file)
--- a/lib/librte_kvargs/rte_kvargs.c
+++ b/lib/librte_kvargs/rte_kvargs.c
@@ -174,8 +174,12 @@ rte_kvargs_process(const struct rte_kvargs *kvlist,
 void
 rte_kvargs_free(struct rte_kvargs *kvlist)
 {
+       if (!kvlist)
+               return;
+
        if (kvlist->str != NULL)
                free(kvlist->str);
+
        free(kvlist);
 }
 

diff --git a/lib/librte_kvargs/rte_kvargs.h b/lib/librte_kvargs/rte_kvargs.h
index ef4efab..ae9ae79 100644 (file)
--- a/lib/librte_kvargs/rte_kvargs.h
+++ b/lib/librte_kvargs/rte_kvargs.h
@@ -115,7 +115,8 @@ void rte_kvargs_free(struct rte_kvargs *kvlist);
  *
  * For each key/value association that matches the given key, calls the
  * handler function with the for a given arg_name passing the value on the
- * dictionary for that key and a given extra argument.
+ * dictionary for that key and a given extra argument. If *kvlist* is NULL
+ * function does nothing.
  *
  * @param kvlist
  *   The rte_kvargs structure