Since 2015, the documentation for FE_DISEQC_SEND_BURST, FE_SET_TONE and FE_SET_VOLTAGE are incorrectly saying that the enums are passed by reference. They aren't: they're passed by value. Fix the documentation to reflect reality. Fixes:81959d996a("[media] DocBook: better document FE_DISEQC_SEND_BURST ioctl") Fixes:d6b6d346e5("[media] DocBook: better document FE_SET_VOLTAGE ioctl") Fixes:6dc59e7a19("[media] DocBook: better document FE_SET_TONE ioctl") Reported-by: Thierry Lelegard <thierry.lelegard@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>