[PATCH iproute2] tc/mqprio: Print extra info on invalid args.

[Caleb Raitto]

From: Caleb Raitto <carai...@google.com>

Print the name of the argument that wasn't understood, and also print
the usage string.

Signed-off-by: Caleb Raitto <carai...@google.com>
---
 tc/q_mqprio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tc/q_mqprio.c b/tc/q_mqprio.c
index 89b46002..cf2eceb4 100644
--- a/tc/q_mqprio.c
+++ b/tc/q_mqprio.c
@@ -167,7 +167,8 @@ static int mqprio_parse_opt(struct qdisc_util *qu, int argc,
                        explain();
                        return -1;
                } else {
-                       fprintf(stderr, "Unknown argument\n");
+                       fprintf(stderr, "Unknown argument: %s\n", *argv);
+                       explain();
                        return -1;
                }
                argc--; argv++;
-- 
2.19.0.rc1.350.ge57e33dbd1-goog