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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>
This commit is contained in:
Jason Wang 2017-07-19 16:54:45 +08:00 committed by David S. Miller
parent 7a68ada6ec
commit 87646a348e
1 changed files with 1 additions and 1 deletions
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2
drivers/virtio/virtio_ring.c
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@ -391,7 +391,7 @@ static inline int virtqueue_add(struct virtqueue *_vq,
vq->desc_state[head].data = data;
if (indirect)
vq->desc_state[head].indir_desc = desc;
if (ctx)
else
vq->desc_state[head].indir_desc = ctx;
/* Put entry in available array (but don't update avail->idx until they