[PATCH v9 4/6] vduse: refactor vdpa_dev_add for goto err handling

["Eugenio Pérez" <eperezma@redhat.com>]

Next patches introduce more error paths in this function.  Refactor it
so they can be accomodated through gotos.

Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Xie Yongji <xieyongji@bytedance.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
v6: New in v6.
---
 drivers/vdpa/vdpa_user/vduse_dev.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index b01f55a1c22d..97be04f73fbf 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -2172,21 +2172,27 @@ static int vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 						  dev->bounce_size);
 	mutex_unlock(&dev->domain_lock);
 	if (!dev->domain) {
-		put_device(&dev->vdev->vdpa.dev);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto domain_err;
 	}
 
 	ret = _vdpa_register_device(&dev->vdev->vdpa, dev->vq_num);
 	if (ret) {
-		put_device(&dev->vdev->vdpa.dev);
-		mutex_lock(&dev->domain_lock);
-		vduse_domain_destroy(dev->domain);
-		dev->domain = NULL;
-		mutex_unlock(&dev->domain_lock);
-		return ret;
+		goto register_err;
 	}
 
 	return 0;
+
+register_err:
+	mutex_lock(&dev->domain_lock);
+	vduse_domain_destroy(dev->domain);
+	dev->domain = NULL;
+	mutex_unlock(&dev->domain_lock);
+
+domain_err:
+	put_device(&dev->vdev->vdpa.dev);
+
+	return ret;
 }
 
 static void vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev)
-- 
2.51.1