[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, 7 insertions, 3 deletions

diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index 6c4ad7e677b3..f9b1543e3d76 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -272,7 +272,7 @@ static struct Qdisc *tbf_create_dflt_qdisc(struct Qdisc *sch, u32 limit)
 
 static int tbf_change(struct Qdisc* sch, struct nlattr *opt)
 {
-        int err = -EINVAL;
+        int err;
         struct tbf_sched_data *q = qdisc_priv(sch);
         struct nlattr *tb[TCA_TBF_PTAB + 1];
         struct tc_tbf_qopt *qopt;
@@ -281,8 +281,12 @@ static int tbf_change(struct Qdisc* sch, struct nlattr *opt)
         struct Qdisc *child = NULL;
         int max_size,n;
 
-        if (nla_parse_nested(tb, TCA_TBF_PTAB, opt, NULL) ||
-            tb[TCA_TBF_PARMS] == NULL ||
+        err = nla_parse_nested(tb, TCA_TBF_PTAB, opt, NULL);
+        if (err < 0)
+                return err;
+
+        err = -EINVAL;
+        if (tb[TCA_TBF_PARMS] == NULL ||
             nla_len(tb[TCA_TBF_PARMS]) < sizeof(*qopt))
                 goto done;