From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Thu, 17 Apr 2014 17:08:00 +0000 (-0700)
Subject: staging: comedi: gsc_hpdi: validate the cmd->start_arg
X-Git-Tag: next-20140428~14^2~208
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4264cb64069e1c746483938c09e0df1099befd8b;p=karo-tx-linux.git

staging: comedi: gsc_hpdi: validate the cmd->start_arg

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@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/comedi/drivers/gsc_hpdi.c b/drivers/staging/comedi/drivers/gsc_hpdi.c
index bae4e9709135..22333c1ad88c 100644
--- a/drivers/staging/comedi/drivers/gsc_hpdi.c
+++ b/drivers/staging/comedi/drivers/gsc_hpdi.c
@@ -410,6 +410,8 @@ 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);
+
 	if (!cmd->chanlist_len || !cmd->chanlist) {
 		cmd->chanlist_len = 32;
 		err |= -EINVAL;