net: sched: Clarify error message when qdisc kind is unknown

When adding a tc rule with a qdisc kind that is not supported or not
compiled into the kernel, the kernel emits the following error: "Error:
Specified qdisc not found.". Found via tdc testing when ETS qdisc was not
compiled in and it was not obvious right away what the message meant
without looking at the kernel code.

Change the error message to be more explicit and say the qdisc kind is
unknown.

Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 2cb496c8487880d0becf4d81b2352bf579ef1fb0..179825a3b2fdb52a5d13bfa529cf494aa6c9e7fb 100644 (file)
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1204,7 +1204,7 @@ static struct Qdisc *qdisc_create(struct net_device *dev,
 
        err = -ENOENT;
        if (!ops) {
-               NL_SET_ERR_MSG(extack, "Specified qdisc not found");
+               NL_SET_ERR_MSG(extack, "Specified qdisc kind is unknown");
                goto err_out;
        }