vhost/test: update test after vhost cleanups

We changed the type of dev.vqs field, update test
module accordingly.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vhost/test.c

@@ -38,17 +38,19 @@ struct vhost_test {
  * read-size critical section for our kind of RCU. */
 static void handle_vq(struct vhost_test *n)
 {
-	struct vhost_virtqueue *vq = &n->dev.vqs[VHOST_TEST_VQ];
+	struct vhost_virtqueue *vq = &n->vqs[VHOST_TEST_VQ];
 	unsigned out, in;
 	int head;
 	size_t len, total_len = 0;
 	void *private;
 
-	private = rcu_dereference_check(vq->private_data, 1);
-	if (!private)
+	mutex_lock(&vq->mutex);
+	private = vq->private_data;
+	if (!private) {
+		mutex_unlock(&vq->mutex);
 		return;
+	}
 
-	mutex_lock(&vq->mutex);
 	vhost_disable_notify(&n->dev, vq);
 
 	for (;;) {
@@ -102,15 +104,23 @@ static int vhost_test_open(struct inode *inode, struct file *f)
 {
 	struct vhost_test *n = kmalloc(sizeof *n, GFP_KERNEL);
 	struct vhost_dev *dev;
+	struct vhost_virtqueue **vqs;
 	int r;
 
 	if (!n)
 		return -ENOMEM;
+	vqs = kmalloc(VHOST_TEST_VQ_MAX * sizeof(*vqs), GFP_KERNEL);
+	if (!vqs) {
+		kfree(n);
+		return -ENOMEM;
+	}
 
 	dev = &n->dev;
+	vqs[VHOST_TEST_VQ] = &n->vqs[VHOST_TEST_VQ];
 	n->vqs[VHOST_TEST_VQ].handle_kick = handle_vq_kick;
-	r = vhost_dev_init(dev, n->vqs, VHOST_TEST_VQ_MAX);
+	r = vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX);
 	if (r < 0) {
+		kfree(vqs);
 		kfree(n);
 		return r;
 	}
@@ -126,9 +136,8 @@ static void *vhost_test_stop_vq(struct vhost_test *n,
 	void *private;
 
 	mutex_lock(&vq->mutex);
-	private = rcu_dereference_protected(vq->private_data,
-					 lockdep_is_held(&vq->mutex));
-	rcu_assign_pointer(vq->private_data, NULL);
+	private = vq->private_data;
+	vq->private_data = NULL;
 	mutex_unlock(&vq->mutex);
 	return private;
 }
@@ -140,7 +149,7 @@ static void vhost_test_stop(struct vhost_test *n, void **privatep)
 
 static void vhost_test_flush_vq(struct vhost_test *n, int index)
 {
-	vhost_poll_flush(&n->dev.vqs[index].poll);
+	vhost_poll_flush(&n->vqs[index].poll);
 }
 
 static void vhost_test_flush(struct vhost_test *n)
@@ -268,14 +277,14 @@ static long vhost_test_ioctl(struct file *f, unsigned int ioctl,
 			return -EFAULT;
 		return vhost_test_run(n, test);
 	case VHOST_GET_FEATURES:
-		features = VHOST_NET_FEATURES;
+		features = VHOST_FEATURES;
 		if (copy_to_user(featurep, &features, sizeof features))
 			return -EFAULT;
 		return 0;
 	case VHOST_SET_FEATURES:
 		if (copy_from_user(&features, featurep, sizeof features))
 			return -EFAULT;
-		if (features & ~VHOST_NET_FEATURES)
+		if (features & ~VHOST_FEATURES)
 			return -EOPNOTSUPP;
 		return vhost_test_set_features(n, features);
 	case VHOST_RESET_OWNER: