Now noone relies on this behavior, we simplify virtqueue_add_buf() so it
return 0 or -errno.
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
---
drivers/virtio/virtio_ring.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 335dcec..5fde312 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -181,10 +181,7 @@ 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[],
@@ -284,7 +281,7 @@ add_head:
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);
--
1.7.9.5
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