pkt_sched: sch_generic: Fix oops in sch_teql

After these commands:
# modprobe sch_teql
# tc qdisc add dev eth0 root teql0
# tc qdisc del dev eth0 root
we get an oops in teql_destroy() when spin_lock is taken from a null
qdisc_sleeping pointer. It's because at the moment teql0 dev haven't
been activated yet, and a qdisc_root_sleeping() is pointing to noop
qdisc's netdev_queue with qdisc_sleeping uninitialized. This patch
fixes this both for noop and noqueue netdev_queues to avoid similar
problems in the future.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarek Poplawski 2008-10-19 23:37:47 -07:00 committed by David S. Miller
parent 944f750227
commit 9f3ffae0db

View file

@ -326,6 +326,7 @@ struct Qdisc_ops noop_qdisc_ops __read_mostly = {
static struct netdev_queue noop_netdev_queue = {
.qdisc = &noop_qdisc,
.qdisc_sleeping = &noop_qdisc,
};
struct Qdisc noop_qdisc = {
@ -352,6 +353,7 @@ static struct Qdisc_ops noqueue_qdisc_ops __read_mostly = {
static struct Qdisc noqueue_qdisc;
static struct netdev_queue noqueue_netdev_queue = {
.qdisc = &noqueue_qdisc,
.qdisc_sleeping = &noqueue_qdisc,
};
static struct Qdisc noqueue_qdisc = {