From 76af50ddee4f2fa76089b25f763749874acce07a Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 9 Sep 2014 16:15:49 -0700 Subject: [PATCH] staging: comedi: me4000: validate cmd->stop_arg in step 3 of (*do_cmdtest) The async command arguments are supposed to be trivially validated in step 3 of the (*do_cmdtest). Fix the validation of the stop_arg. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/me4000.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index e600ce8..6561b00 100644 --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -923,6 +923,11 @@ static int me4000_ai_do_cmd_test(struct comedi_device *dev, err |= -EINVAL; } + if (cmd->stop_src == TRIG_COUNT) + err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1); + else /* TRIG_NONE */ + err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0); + if (err) return 3; @@ -1029,13 +1034,6 @@ static int me4000_ai_do_cmd_test(struct comedi_device *dev, err++; } } - if (cmd->stop_src == TRIG_COUNT) { - if (cmd->stop_arg == 0) { - dev_err(dev->class_dev, "Invalid stop arg\n"); - cmd->stop_arg = 1; - err++; - } - } if (cmd->scan_end_src == TRIG_COUNT) { if (cmd->scan_end_arg == 0) { dev_err(dev->class_dev, "Invalid scan end arg\n"); -- 2.7.4