virtio: find_vqs/del_vqs virtio operations

[net-next-2.6.git] / drivers / lguest / lguest_device.c

diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 4babed899d5915e82a9cfeb2e01429afdabfcec0..e082cdac88b4bb283f41ebb611671d583ca78ecb 100644 (file)
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -313,6 +313,38 @@ static void lg_del_vq(struct virtqueue *vq)
        kfree(lvq);
 }
 
+static void lg_del_vqs(struct virtio_device *vdev)
+{
+       struct virtqueue *vq, *n;
+
+       list_for_each_entry_safe(vq, n, &vdev->vqs, list)
+               lg_del_vq(vq);
+}
+
+static int lg_find_vqs(struct virtio_device *vdev, unsigned nvqs,
+                      struct virtqueue *vqs[],
+                      vq_callback_t *callbacks[],
+                      const char *names[])
+{
+       struct lguest_device *ldev = to_lgdev(vdev);
+       int i;
+
+       /* We must have this many virtqueues. */
+       if (nvqs > ldev->desc->num_vq)
+               return -ENOENT;
+
+       for (i = 0; i < nvqs; ++i) {
+               vqs[i] = lg_find_vq(vdev, i, callbacks[i], names[i]);
+               if (IS_ERR(vqs[i]))
+                       goto error;
+       }
+       return 0;
+
+error:
+       lg_del_vqs(vdev);
+       return PTR_ERR(vqs[i]);
+}
+
 /* The ops structure which hooks everything together. */
 static struct virtio_config_ops lguest_config_ops = {
        .get_features = lg_get_features,
@@ -322,8 +354,8 @@ static struct virtio_config_ops lguest_config_ops = {
        .get_status = lg_get_status,
        .set_status = lg_set_status,
        .reset = lg_reset,
-       .find_vq = lg_find_vq,
-       .del_vq = lg_del_vq,
+       .find_vqs = lg_find_vqs,
+       .del_vqs = lg_del_vqs,
 };
 
 /* The root device for the lguest virtio devices.  This makes them appear as