diff options
| -rw-r--r-- | src/gallium/drivers/iris/iris_program.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/gallium/drivers/iris/iris_program.c b/src/gallium/drivers/iris/iris_program.c index 24feb66fff7..691fb1fb258 100644 --- a/src/gallium/drivers/iris/iris_program.c +++ b/src/gallium/drivers/iris/iris_program.c @@ -1204,6 +1204,22 @@ iris_update_compiled_tcs(struct iris_context *ice) ice->state.dirty |= IRIS_DIRTY_TCS | IRIS_DIRTY_BINDINGS_TCS | IRIS_DIRTY_CONSTANTS_TCS; + + if (!tcs) { + /* We're binding a passthrough TCS, which doesn't have uniforms. + * Since there's no actual TCS, the state tracker doesn't bother + * to call set_constant_buffers to clear stale constant buffers. + * + * We do upload TCS constants for the default tesslevel system + * values, however. In this case, we would see stale constant + * data and try and read a dangling cbuf0->user_buffer pointer. + * Just zero out the stale constants to avoid the upload. + */ + struct iris_shader_state *shs = + &ice->state.shaders[MESA_SHADER_TESS_CTRL]; + + memset(&shs->cbuf0, 0, sizeof(shs->cbuf0)); + } } } |