f52c8fba98
For unknown ioctls the correct error is ENOTTY "Inappropriate ioctl for device". ENOSYS as returned before should only be used to indicate that a syscall is not available at all. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com> Link: https://lore.kernel.org/r/20231101-rfkill-ioctl-enosys-v1-1-5bf374fabffe@weissschuh.net [in theory this breaks userspace API, but it was discussed and researched, and nothing found relying on the current behaviour] Signed-off-by: Johannes Berg <johannes.berg@intel.com>