staging: comedi: dt2801: fix access to 2nd dio subdevice

Only 4 subdevices are allocated by this driver. The 2nd dio
subdevice is 'dev->subdevice + 3' not '... + 4'.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/dt2801.c b/drivers/staging/comedi/drivers/dt2801.c
index d332269..b6481bc 100644 (file)
--- a/drivers/staging/comedi/drivers/dt2801.c
+++ b/drivers/staging/comedi/drivers/dt2801.c
@@ -532,7 +532,7 @@ static int dt2801_dio_insn_bits(struct comedi_device *dev,
 {
        int which = 0;
 
-       if (s == dev->subdevices + 4)
+       if (s == dev->subdevices + 3)
                which = 1;
 
        if (data[0]) {
@@ -555,7 +555,7 @@ static int dt2801_dio_insn_config(struct comedi_device *dev,
 {
        int which = 0;
 
-       if (s == dev->subdevices + 4)
+       if (s == dev->subdevices + 3)
                which = 1;
 
        /* configure */