commit 03891f82 upstream.

This patch to handle the asynchronous unregister
device event so the device IPsec offload resources
could be cleanly released.

Fixes: e4db5b61 ("xfrm: policy: remove pcpu policy cache")
Signed-off-by: NRaed Salem <raeds@mellanox.com>
Reviewed-by: NBoris Pismenny <borisp@mellanox.com>
Reviewed-by: NSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>