drm/virtio: fix memory leak in virtio_gpu_cleanup_object()

Before setting shmem->pages to NULL, kfree() should
be called.

Signed-off-by: Xin He <[email protected]>
Reviewed-by: Qi Liu <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Gerd Hoffmann <[email protected]>

Author: Xin He

drivers/gpu/drm/virtio/virtgpu_object.c

@@ -79,6 +79,7 @@ void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo)
 			}
 
 			sg_free_table(shmem->pages);
+			kfree(shmem->pages);
 			shmem->pages = NULL;
 			drm_gem_shmem_unpin(&bo->base.base);
 		}