4.16-stable review patch. If anyone has any objections, please let me know.
------------------ From: Gerd Hoffmann <[email protected]> commit 9f591ae60e1be026901398ef99eede91237aa3a1 upstream. On unknown/unhandled ioctls the driver should return an error, so userspace knows it tried to use something unsupported. Cc: [email protected] Signed-off-by: Gerd Hoffmann <[email protected]> Reviewed-by: Alex Williamson <[email protected]> Signed-off-by: Zhenyu Wang <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -1284,7 +1284,7 @@ static long intel_vgpu_ioctl(struct mdev } - return 0; + return -ENOTTY; } static ssize_t
