virtio: explicit enable_cb/disable_cb rather than callback return.

It seems that virtio_net wants to disable callbacks (interrupts) before
calling netif_rx_schedule(), so we can't use the return value to do so.

Rename "restart" to "cb_enable" and introduce "cb_disable" hook: callback
now returns void, rather than a boolean.

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

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 1c63d5b64c20..54a8017ad487 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -36,7 +36,7 @@ struct virtblk_req
         struct virtio_blk_inhdr in_hdr;
 };
 
-static bool blk_done(struct virtqueue *vq)
+static void blk_done(struct virtqueue *vq)
 {
         struct virtio_blk *vblk = vq->vdev->priv;
         struct virtblk_req *vbr;
@@ -65,7 +65,6 @@ static bool blk_done(struct virtqueue *vq)
         /* In case queue is stopped waiting for more buffers. */
         blk_start_queue(vblk->disk->queue);
         spin_unlock_irqrestore(&vblk->lock, flags);
-        return true;
 }
 
 static bool do_req(struct request_queue *q, struct virtio_blk *vblk,