staging: comedi: dmm32at: tidy up cmd->convert_{src, arg} validation

This driver only supports a single convert_src, TRIG_TIMER. Tidy up
the (*do_cmdtest) validation of the cmd->convert_{src,arg}.

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/dmm32at.c b/drivers/staging/comedi/drivers/dmm32at.c
index 9a46a669179eb6d57970bffe57481905d98bdf45..637b6651e5593cd2ffe910a5a493a1547f79fe7f 100644 (file)
--- a/drivers/staging/comedi/drivers/dmm32at.c
+++ b/drivers/staging/comedi/drivers/dmm32at.c
@@ -262,8 +262,7 @@ static int dmm32at_ai_cmdtest(struct comedi_device *dev,
 
        err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
        err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
-       err |= cfc_check_trigger_src(&cmd->convert_src,
-                                       TRIG_TIMER /*| TRIG_EXT */);
+       err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_TIMER);
        err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
        err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 
@@ -272,7 +271,6 @@ static int dmm32at_ai_cmdtest(struct comedi_device *dev,
 
        /* Step 2a : make sure trigger sources are unique */
 
-       err |= cfc_check_trigger_is_unique(cmd->convert_src);
        err |= cfc_check_trigger_is_unique(cmd->stop_src);
 
        /* Step 2b : and mutually compatible */
@@ -287,20 +285,14 @@ static int dmm32at_ai_cmdtest(struct comedi_device *dev,
        err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg, 1000000);
        err |= cfc_check_trigger_arg_max(&cmd->scan_begin_arg, 1000000000);
 
-       if (cmd->convert_src == TRIG_TIMER) {
-               if (cmd->convert_arg >= 17500)
-                       cmd->convert_arg = 20000;
-               else if (cmd->convert_arg >= 12500)
-                       cmd->convert_arg = 15000;
-               else if (cmd->convert_arg >= 7500)
-                       cmd->convert_arg = 10000;
-               else
-                       cmd->convert_arg = 5000;
-       } else {
-               /* external trigger */
-               /* see above */
-               err |= cfc_check_trigger_arg_max(&cmd->convert_arg, 9);
-       }
+       if (cmd->convert_arg >= 17500)
+               cmd->convert_arg = 20000;
+       else if (cmd->convert_arg >= 12500)
+               cmd->convert_arg = 15000;
+       else if (cmd->convert_arg >= 7500)
+               cmd->convert_arg = 10000;
+       else
+               cmd->convert_arg = 5000;
 
        err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
 
@@ -314,18 +306,12 @@ static int dmm32at_ai_cmdtest(struct comedi_device *dev,
 
        /* step 4: fix up any arguments */
 
-       arg = cmd->scan_begin_arg;
+       arg = cmd->convert_arg;
        dmm32at_ns_to_timer(&arg, cmd->flags);
-       err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
+       err |= cfc_check_trigger_arg_is(&cmd->convert_arg, arg);
 
-       if (cmd->convert_src == TRIG_TIMER) {
-               arg = cmd->convert_arg;
-               dmm32at_ns_to_timer(&arg, cmd->flags);
-               err |= cfc_check_trigger_arg_is(&cmd->convert_arg, arg);
-
-               arg = cmd->convert_arg * cmd->scan_end_arg;
-               err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg, arg);
-       }
+       arg = cmd->convert_arg * cmd->scan_end_arg;
+       err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg, arg);
 
        if (err)
                return 4;