diff options
Diffstat (limited to 'drivers/staging/comedi')
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_labpc.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c index 6fb405eb0933..8b41813ebf65 100644 --- a/drivers/staging/comedi/drivers/ni_labpc.c +++ b/drivers/staging/comedi/drivers/ni_labpc.c @@ -531,24 +531,26 @@ static void labpc_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd, static enum scan_mode labpc_ai_scan_mode(const struct comedi_cmd *cmd) { + unsigned int chan0; + unsigned int chan1; + if (cmd->chanlist_len == 1) return MODE_SINGLE_CHAN; - /* chanlist may be NULL during cmdtest. */ + /* chanlist may be NULL during cmdtest */ if (cmd->chanlist == NULL) return MODE_MULT_CHAN_UP; - if (CR_CHAN(cmd->chanlist[0]) == CR_CHAN(cmd->chanlist[1])) - return MODE_SINGLE_CHAN_INTERVAL; + chan0 = CR_CHAN(cmd->chanlist[0]); + chan1 = CR_CHAN(cmd->chanlist[1]); - if (CR_CHAN(cmd->chanlist[0]) < CR_CHAN(cmd->chanlist[1])) + if (chan0 < chan1) return MODE_MULT_CHAN_UP; - if (CR_CHAN(cmd->chanlist[0]) > CR_CHAN(cmd->chanlist[1])) + if (chan0 > chan1) return MODE_MULT_CHAN_DOWN; - pr_err("ni_labpc: bug! cannot determine AI scan mode\n"); - return 0; + return MODE_SINGLE_CHAN_INTERVAL; } static int labpc_ai_check_chanlist(struct comedi_device *dev, |