[NET_SCHED]: Propagate nla_parse return value

nla_parse() returns more detailed errno codes, propagate them back on
error.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/sched/ematch.c b/net/sched/ematch.c
index 72d9b2735245..d2b480f01a40 100644
--- a/net/sched/ematch.c
+++ b/net/sched/ematch.c
@@ -301,7 +301,7 @@ errout:
 int tcf_em_tree_validate(struct tcf_proto *tp, struct nlattr *nla,
                          struct tcf_ematch_tree *tree)
 {
-        int idx, list_len, matches_len, err = -EINVAL;
+        int idx, list_len, matches_len, err;
         struct nlattr *tb[TCA_EMATCH_TREE_MAX + 1];
         struct nlattr *rt_match, *rt_hdr, *rt_list;
         struct tcf_ematch_tree_hdr *tree_hdr;
@@ -312,9 +312,11 @@ int tcf_em_tree_validate(struct tcf_proto *tp, struct nlattr *nla,
                 return 0;
         }
 
-        if (nla_parse_nested(tb, TCA_EMATCH_TREE_MAX, nla, NULL) < 0)
+        err = nla_parse_nested(tb, TCA_EMATCH_TREE_MAX, nla, NULL);
+        if (err < 0)
                 goto errout;
 
+        err = -EINVAL;
         rt_hdr = tb[TCA_EMATCH_TREE_HDR];
         rt_list = tb[TCA_EMATCH_TREE_LIST];