drm/nouveau/nvif: return success from sclass even for objects without children
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/ioctl.c b/drivers/gpu/drm/nouveau/nvkm/core/ioctl.c
index 629ee56d..ee6ff01 100644
--- a/drivers/gpu/drm/nouveau/nvkm/core/ioctl.c
+++ b/drivers/gpu/drm/nouveau/nvkm/core/ioctl.c
@@ -57,18 +57,18 @@
} *args = data;
int ret;
- if (!nv_iclass(object, NV_PARENT_CLASS)) {
- nvif_debug(object, "cannot have children (sclass)\n");
- return -ENODEV;
- }
-
nvif_ioctl(object, "sclass size %d\n", size);
if (nvif_unpack(args->v0, 0, 0, true)) {
nvif_ioctl(object, "sclass vers %d count %d\n",
args->v0.version, args->v0.count);
if (size == args->v0.count * sizeof(args->v0.oclass[0])) {
- ret = nvkm_parent_lclass(object, args->v0.oclass,
+ if (nv_iclass(object, NV_PARENT_CLASS)) {
+ ret = nvkm_parent_lclass(object,
+ args->v0.oclass,
args->v0.count);
+ } else {
+ ret = 0;
+ }
if (ret >= 0) {
args->v0.count = ret;
ret = 0;