[PATCH 31/49] staging: comedi: gsc_hpdi: validate the cmd->start_arg

[H Hartley Sweeten]

The cmd->start_arg should be trivially validated in Step 3 of the
(*do_cmdtest) functions. Add the necessary code.

Signed-off-by: H Hartley Sweeten <hsweeten at visionengravers.com>
Cc: Ian Abbott <abbotti at mev.co.uk>
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 drivers/staging/comedi/drivers/gsc_hpdi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/comedi/drivers/gsc_hpdi.c b/drivers/staging/comedi/drivers/gsc_hpdi.c
index 7cf8459..1d1fd8b 100644
--- a/drivers/staging/comedi/drivers/gsc_hpdi.c
+++ b/drivers/staging/comedi/drivers/gsc_hpdi.c
@@ -410,6 +410,7 @@ static int gsc_hpdi_cmd_test(struct comedi_device *dev,
 
 	/* Step 3: check if arguments are trivially valid */
 
+	err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
 	err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
 
 	if (cmd->stop_src == TRIG_COUNT)
-- 
1.8.5.2