) {   input.size = 0;   input.mux = mux_id;   params.length = input.size;   params.pointer = &input;   info = amdgpu_atpx_call(atpx->handle,      ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION,      &params);   if (!info)    return -EIO;   kfree(info);  }  return 0; }  /**  * amdgpu_atpx_switch