The ioctl expects that certain fields will be zeroed, so we should allow
the helper function to actually work in non-Valgrind builds.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reported-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>