mainline inclusion
from mainline-5.1-rc1
commit 507b820009a4
category: bugfix
bugzilla: 16035
CVE: NA

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

In case alloc_workqueue() fails, return -ENOMEM to avoid
potential NULL pointer dereferences.
Signed-off-by: NKangjie Lu <kjlu@umn.edu>
[lorenzo.pieralisi@arm.com: commit log and code update]
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: NYao Hongbo <yaohongbo@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>