Commit 98e8c6bc authored by Rusty Russell's avatar Rusty Russell

virtio: make virtqueue_add_buf() returning 0 on success, not capacity.

Now noone relies on this behavior, we simplify virtqueue_add_buf() so it
return 0 or -errno.
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 49e86f16
......@@ -188,10 +188,7 @@ static int vring_add_indirect(struct vring_virtqueue *vq,
* Caller must ensure we don't call this with other virtqueue operations
* at the same time (except where noted).
*
* Returns remaining capacity of queue or a negative error
* (ie. ENOSPC). Note that it only really makes sense to treat all
* positive return values as "available": indirect buffers mean that
* we can put an entire sg[] array inside a single queue entry.
* Returns zero or a negative error (ie. ENOSPC, ENOMEM).
*/
int virtqueue_add_buf(struct virtqueue *_vq,
struct scatterlist sg[],
......@@ -291,7 +288,7 @@ int virtqueue_add_buf(struct virtqueue *_vq,
pr_debug("Added buffer head %i to %p\n", head, vq);
END_USE(vq);
return vq->vq.num_free;
return 0;
}
EXPORT_SYMBOL_GPL(virtqueue_add_buf);
......
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