diff options
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_mio_common.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c index c66affd993aa..69d71f328006 100644 --- a/drivers/staging/comedi/drivers/ni_mio_common.c +++ b/drivers/staging/comedi/drivers/ni_mio_common.c @@ -4355,6 +4355,10 @@ static void ni_write_caldac(struct comedi_device *dev, int addr, int val) addr -= caldacs[type].n_chans; } + /* bits will be 0 if there is no caldac for the given addr */ + if (bits == 0) + return; + for (bit = 1 << (bits - 1); bit; bit >>= 1) { ni_writeb(dev, ((bit & bitstring) ? 0x02 : 0), Serial_Command); udelay(1); |