drm: Balance error path for GEM handle allocation

[ Upstream commit 6984128d01cf935820a0563f3a00c6623ba58109 ]

The current error path for failure when establishing a handle for a GEM
object is unbalance, e.g. we call object_close() without calling first
object_open(). Use the typical onion structure to only undo what has
been set up prior to the error.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index c7de454e8e889591453612633e87e69b329c1ee0..b205224f1a44accecf2f688cae137485095da82e 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -338,27 +338,32 @@ drm_gem_handle_create_tail(struct drm_file *file_priv,
        spin_unlock(&file_priv->table_lock);
        idr_preload_end();
        mutex_unlock(&dev->object_name_lock);
-       if (ret < 0) {
-               drm_gem_object_handle_unreference_unlocked(obj);
-               return ret;
-       }
+       if (ret < 0)
+               goto err_unref;
+
        *handlep = ret;
 
        ret = drm_vma_node_allow(&obj->vma_node, file_priv->filp);
-       if (ret) {
-               drm_gem_handle_delete(file_priv, *handlep);
-               return ret;
-       }
+       if (ret)
+               goto err_remove;
 
        if (dev->driver->gem_open_object) {
                ret = dev->driver->gem_open_object(obj, file_priv);
-               if (ret) {
-                       drm_gem_handle_delete(file_priv, *handlep);
-                       return ret;
-               }
+               if (ret)
+                       goto err_revoke;
        }
 
        return 0;
+
+err_revoke:
+       drm_vma_node_revoke(&obj->vma_node, file_priv->filp);
+err_remove:
+       spin_lock(&file_priv->table_lock);
+       idr_remove(&file_priv->object_idr, *handlep);
+       spin_unlock(&file_priv->table_lock);
+err_unref:
+       drm_gem_object_handle_unreference_unlocked(obj);
+       return ret;
 }
 
 /**