[v4 1/5] vhost: skip crypto op fetch before vring init

[Akhil Goyal]

> Subject: [v4 1/5] vhost: skip crypto op fetch before vring init
> 
> Until virtio avail ring is initialized (by VHOST_USER_SET_VRING_ADDR),
> worker thread should not try to fetch crypto op, which would lead to
> memory fault.
> 
> Fixes: 939066d96563 ("vhost/crypto: add public function implementation")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Gowrishankar Muthukrishnan <gmuthukrishn at marvell.com>
Acked-by: Akhil Goyal <gakhil at marvell.com>