[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, 5 insertions, 1 deletions

diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c
index e58739153782..aaa32a22726d 100644
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -223,8 +223,12 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
          */
         if (flow)
                 return -EBUSY;
-        if (opt == NULL || nla_parse_nested(tb, TCA_ATM_MAX, opt, NULL))
+        if (opt == NULL)
                 return -EINVAL;
+        error = nla_parse_nested(tb, TCA_ATM_MAX, opt, NULL);
+        if (error < 0)
+                return error;
+
         if (!tb[TCA_ATM_FD] || nla_len(tb[TCA_ATM_FD]) < sizeof(fd))
                 return -EINVAL;
         fd = *(int *)nla_data(tb[TCA_ATM_FD]);