virtio_ring: allow to store zero as the ctx
authorJason Wang <jasowang@redhat.com>
Wed, 19 Jul 2017 08:54:45 +0000 (16:54 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 24 Jul 2017 20:37:00 +0000 (13:37 -0700)
commit87646a348ebcb1415a479be31f1c41f276e057e6
treef1096c513326ae90307e9357886be589b4e4a519
parent7a68ada6ec7d88c68057d3a4c2a517eb94289976
virtio_ring: allow to store zero as the ctx

Allow zero to be store as a ctx, with this we could store e.g zero
value which could be meaningful for the case of storing headroom
through ctx.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/virtio/virtio_ring.c