virtio_balloon: use simplified virtqueue accessors.

We never add buffers with input and output parts, so use the new accessors.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 8dab163..bd3ae32 100644 (file)
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -108,7 +108,7 @@ static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq)
        sg_init_one(&sg, vb->pfns, sizeof(vb->pfns[0]) * vb->num_pfns);
 
        /* We should always be able to add one buffer to an empty queue. */
-       if (virtqueue_add_buf(vq, &sg, 1, 0, vb, GFP_KERNEL) < 0)
+       if (virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL) < 0)
                BUG();
        virtqueue_kick(vq);
 
@@ -256,7 +256,7 @@ static void stats_handle_request(struct virtio_balloon *vb)
        if (!virtqueue_get_buf(vq, &len))
                return;
        sg_init_one(&sg, vb->stats, sizeof(vb->stats));
-       if (virtqueue_add_buf(vq, &sg, 1, 0, vb, GFP_KERNEL) < 0)
+       if (virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL) < 0)
                BUG();
        virtqueue_kick(vq);
 }
@@ -341,7 +341,7 @@ static int init_vqs(struct virtio_balloon *vb)
                 * use it to signal us later.
                 */
                sg_init_one(&sg, vb->stats, sizeof vb->stats);
-               if (virtqueue_add_buf(vb->stats_vq, &sg, 1, 0, vb, GFP_KERNEL)
+               if (virtqueue_add_outbuf(vb->stats_vq, &sg, 1, vb, GFP_KERNEL)
                    < 0)
                        BUG();
                virtqueue_kick(vb->stats_vq);