mainline inclusion
from mainline-v5.2-rc7
commit 45d5cb13
category: bugfix
bugzilla: 16960
CVE: NA

-------------------------------------

If register_qdisc fails, we should unregister
netdevice notifier.
Reported-by: NHulk Robot <hulkci@huawei.com>
Fixes: e0a7683d ("net/sched: cbs: fix port_rate miscalculation")
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: Nguodeqing <geffrey.guo@huawei.com>
Reviewed-by: NWenan Mao <maowenan@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>