Use the comedi_fc helper cfc_check_trigger_arg_is() to validate the
trigger arguments when the source is TRIG_TIMER.
Use cfc_check_trigger_arg_min() to vaidate the scan_begin_arg when the
scan_begin_src and convert_src are both TRIG_TIMER.
All the arguments are unsigned int, change the local variable to an
unsigned int and rename it for aesthetic reasons.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/dmm32at.c | 29 ++++++++++++-----------------
1 file changed, 12 insertions(+), 17 deletions(-)
diff --git a/drivers/staging/comedi/drivers/dmm32at.c
b/drivers/staging/comedi/drivers/dmm32at.c
index 68260e6..b50c0d2 100644
--- a/drivers/staging/comedi/drivers/dmm32at.c
+++ b/drivers/staging/comedi/drivers/dmm32at.c
@@ -275,7 +275,7 @@ static int dmm32at_ai_cmdtest(struct comedi_device *dev,
struct comedi_cmd *cmd)
{
int err = 0;
- int tmp;
+ unsigned int arg;
/* Step 1 : check if triggers are trivially valid */
@@ -351,24 +351,19 @@ static int dmm32at_ai_cmdtest(struct comedi_device *dev,
/* step 4: fix up any arguments */
if (cmd->scan_begin_src == TRIG_TIMER) {
- tmp = cmd->scan_begin_arg;
- dmm32at_ns_to_timer(&cmd->scan_begin_arg,
- cmd->flags & TRIG_ROUND_MASK);
- if (tmp != cmd->scan_begin_arg)
- err++;
+ arg = cmd->scan_begin_arg;
+ dmm32at_ns_to_timer(&arg, cmd->flags & TRIG_ROUND_MASK);
+ err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
}
if (cmd->convert_src == TRIG_TIMER) {
- tmp = cmd->convert_arg;
- dmm32at_ns_to_timer(&cmd->convert_arg,
- cmd->flags & TRIG_ROUND_MASK);
- if (tmp != cmd->convert_arg)
- err++;
- if (cmd->scan_begin_src == TRIG_TIMER &&
- cmd->scan_begin_arg <
- cmd->convert_arg * cmd->scan_end_arg) {
- cmd->scan_begin_arg =
- cmd->convert_arg * cmd->scan_end_arg;
- err++;
+ arg = cmd->convert_arg;
+ dmm32at_ns_to_timer(&arg, cmd->flags & TRIG_ROUND_MASK);
+ err |= cfc_check_trigger_arg_is(&cmd->convert_arg, arg);
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ arg = cmd->convert_arg * cmd->scan_end_arg;
+ err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
+ arg);
}
}
--
1.9.2
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