Increase idx only after updating the used element.
Not doing so may mark a buffer as used without having
it's head and length updated.
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
---
tools/kvm/virtio.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/tools/kvm/virtio.c b/tools/kvm/virtio.c
index 6249521..b2d2407 100644
--- a/tools/kvm/virtio.c
+++ b/tools/kvm/virtio.c
@@ -7,9 +7,10 @@
struct vring_used_elem *virt_queue__set_used_elem(struct virt_queue *queue, uint32_t head, uint32_t len)
{
struct vring_used_elem *used_elem;
- used_elem = &queue->vring.used->ring[queue->vring.used->idx++ % queue->vring.num];
+ used_elem = &queue->vring.used->ring[queue->vring.used->idx % queue->vring.num];
used_elem->id = head;
used_elem->len = len;
+ queue->vring.used->idx++;
return used_elem;
}
--
1.7.5.rc3
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
