drm/omap: gem: Fix omap_gem_new() error path

When an error occurs in omap_gem_new() the function calls
omap_gem_free_object() to clean up. However, that function expects to be
called on a fully initialized GEM object and thus crashes.

Replace it by manual cleanup.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/omap_gem.c

@@ -1398,35 +1398,37 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev,
 		size = PAGE_ALIGN(gsize.bytes);
 	}
 
-	spin_lock(&priv->list_lock);
-	list_add(&omap_obj->mm_list, &priv->obj_list);
-	spin_unlock(&priv->list_lock);
-
-	/* Allocate memory if needed. */
-	if (flags & OMAP_BO_MEM_DMA_API) {
-		omap_obj->vaddr = dma_alloc_writecombine(dev->dev, size,
-							 &omap_obj->paddr,
-							 GFP_KERNEL);
-		if (!omap_obj->vaddr)
-			goto fail;
-	}
-
 	/* Initialize the GEM object. */
 	if (!(flags & OMAP_BO_MEM_SHMEM)) {
 		drm_gem_private_object_init(dev, obj, size);
 	} else {
 		ret = drm_gem_object_init(dev, obj, size);
 		if (ret)
-			goto fail;
+			goto err_free;
 
 		mapping = file_inode(obj->filp)->i_mapping;
 		mapping_set_gfp_mask(mapping, GFP_USER | __GFP_DMA32);
 	}
 
+	/* Allocate memory if needed. */
+	if (flags & OMAP_BO_MEM_DMA_API) {
+		omap_obj->vaddr = dma_alloc_writecombine(dev->dev, size,
+							 &omap_obj->paddr,
+							 GFP_KERNEL);
+		if (!omap_obj->vaddr)
+			goto err_release;
+	}
+
+	spin_lock(&priv->list_lock);
+	list_add(&omap_obj->mm_list, &priv->obj_list);
+	spin_unlock(&priv->list_lock);
+
 	return obj;
 
-fail:
-	omap_gem_free_object(obj);
+err_release:
+	drm_gem_object_release(obj);
+err_free:
+	kfree(omap_obj);
 	return NULL;
 }