[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, 6 insertions, 1 deletions

diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index 6ce8da5aca0b..dcf6afc196f8 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -207,10 +207,15 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt)
         struct nlattr *tb[TCA_RED_MAX + 1];
         struct tc_red_qopt *ctl;
         struct Qdisc *child = NULL;
+        int err;
 
-        if (opt == NULL || nla_parse_nested(tb, TCA_RED_MAX, opt, NULL))
+        if (opt == NULL)
                 return -EINVAL;
 
+        err = nla_parse_nested(tb, TCA_RED_MAX, opt, NULL);
+        if (err < 0)
+                return err;
+
         if (tb[TCA_RED_PARMS] == NULL ||
             nla_len(tb[TCA_RED_PARMS]) < sizeof(*ctl) ||
             tb[TCA_RED_STAB] == NULL ||