put if(cmd->chanlist) block in cmdtest

diff --git a/comedi/drivers/cb_pcidas.c b/comedi/drivers/cb_pcidas.c
index 5ebff2d228d68a09bb60ebc546194c0d737d5e55..418c37b65e39d24424788b2dffcd3861f26f06d9 100644 (file)
--- a/comedi/drivers/cb_pcidas.c
+++ b/comedi/drivers/cb_pcidas.c
@@ -752,19 +752,22 @@ static int cb_pcidas_ai_cmdtest(comedi_device *dev,comedi_subdevice *s,
        }
 
        // check channel/gain list against card's limitations
-       gain = CR_RANGE(cmd->chanlist[0]);
-       start_chan = CR_CHAN(cmd->chanlist[0]);
-       for(i = 1; i < cmd->chanlist_len; i++)
+       if(cmd->chanlist)
        {
-               if(CR_CHAN(cmd->chanlist[i]) != (start_chan + i) % s->n_chan)
+               gain = CR_RANGE(cmd->chanlist[0]);
+               start_chan = CR_CHAN(cmd->chanlist[0]);
+               for(i = 1; i < cmd->chanlist_len; i++)
                {
-                       comedi_error(dev, "entries in chanlist must be consecutive channels, counting upwards\n");
-                       err++;
-               }
-               if(CR_RANGE(cmd->chanlist[i]) != gain)
-               {
-                       comedi_error(dev, "entries in chanlist must all have the same gain\n");
-                       err++;
+                       if(CR_CHAN(cmd->chanlist[i]) != (start_chan + i) % s->n_chan)
+                       {
+                               comedi_error(dev, "entries in chanlist must be consecutive channels, counting upwards\n");
+                               err++;
+                       }
+                       if(CR_RANGE(cmd->chanlist[i]) != gain)
+                       {
+                               comedi_error(dev, "entries in chanlist must all have the same gain\n");
+                               err++;
+                       }
                }
        }