drm/nouveau/abi16: implement limited interoperability with usif/nvif
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_usif.c b/drivers/gpu/drm/nouveau/nouveau_usif.c
index cb1182d..89dc4ce 100644
--- a/drivers/gpu/drm/nouveau/nouveau_usif.c
+++ b/drivers/gpu/drm/nouveau/nouveau_usif.c
@@ -24,6 +24,7 @@
#include "nouveau_drm.h"
#include "nouveau_usif.h"
+#include "nouveau_abi16.h"
#include <nvif/notify.h>
#include <nvif/unpack.h>
@@ -316,11 +317,21 @@
} else
goto done;
+ /* USIF slightly abuses some return-only ioctl members in order
+ * to provide interoperability with the older ABI16 objects
+ */
mutex_lock(&cli->mutex);
+ if (argv->v0.route) {
+ if (ret = -EINVAL, argv->v0.route == 0xff)
+ ret = nouveau_abi16_usif(filp, argv, argc);
+ if (ret) {
+ mutex_unlock(&cli->mutex);
+ goto done;
+ }
+ }
+
switch (argv->v0.type) {
case NVIF_IOCTL_V0_NEW:
- /* ... except if we're creating children */
- argv->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
ret = usif_object_new(filp, data, size, argv, argc);
break;
case NVIF_IOCTL_V0_NTFY_NEW: