staging: comedi: dt282x: fix the ao cmd->start_arg use for TRIG_INT
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Thu, 17 Apr 2014 17:07:59 +0000 (10:07 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 22 Apr 2014 17:21:31 +0000 (10:21 -0700)
commitbdbca9b562a2e892b77811ef2b70e1981e26b7e2
tree41fbbc9285a9837f40c53ae7d151f41501cc1953
parent020cb120c1c434f69d1af096ca17b690100b3b07
staging: comedi: dt282x: fix the ao cmd->start_arg use for TRIG_INT

This driver only supports a cmd->start_src of TRIG_INT for ao commands. The
cmd->start_arg is trivially validated to be 0. For TRIG_INT source, the
cmd->start_arg is actually the valid trig_num that is passed to the async
(*inttrig) callback.

Refactor the (*inttrig) function so that the cmd->start_arg is used to check
the trig_num instead of the open coded value.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers/dt282x.c