Step 3 of the AI (*do_cmdtest) validates that the cmd->chanlist_len is >= 1. If
it's not the (*do_cmdtest) fails and check_channel_list() is never called. This
This function is also called by the AI (*do_cmd) and the comedi core ensures
that the async command has a valid chanlist. Remove the unnecessary 'n_chan'
check.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/adl_pci9118.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/staging/comedi/drivers/adl_pci9118.c b/drivers/staging/comedi/drivers/adl_pci9118.c
index a7c9744..dcfe5cc 100644
--- a/drivers/staging/comedi/drivers/adl_pci9118.c
+++ b/drivers/staging/comedi/drivers/adl_pci9118.c
@@ -303,11 +303,6 @@ static int check_channel_list(struct comedi_device *dev,
struct pci9118_private *devpriv = dev->private;
unsigned int i, differencial = 0, bipolar = 0;
- /* correct channel and range number check itself comedi/range.c */
- if (n_chan < 1) {
- dev_err(dev->class_dev, "range/channel list is empty!\n");
- return 0;
- }
if ((frontadd + n_chan + backadd) > s->len_chanlist) {
dev_err(dev->class_dev,
"range/channel list is too long for actual configuration!\n");
--
2.5.1
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