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staging: comedi: me4000: validate the cmd->start_arg

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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>
This commit is contained in:
H Hartley Sweeten 2014-04-17 10:08:01 -07:00 committed by Greg Kroah-Hartman
parent 4264cb6406
commit 025b918731
1 changed files with 2 additions and 0 deletions
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2
drivers/staging/comedi/drivers/me4000.c
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@ -918,6 +918,8 @@ static int me4000_ai_do_cmd_test(struct comedi_device *dev,
/* Step 3: check if arguments are trivially valid */ /* Step 3: check if arguments are trivially valid */
err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
if (cmd->chanlist_len < 1) { if (cmd->chanlist_len < 1) {
cmd->chanlist_len = 1; cmd->chanlist_len = 1;
err |= -EINVAL; err |= -EINVAL;