staging: comedi: cb_pcimdda: fix bug in call to subdev_8255_cleanup

The attach function only allocated 2 subdevices, an analog output
sundevice (index 0) and the 8255 dio subdevice (index 1). The
detach function is passing the wrong subdevice (index 2) to the
subdev_8255_cleanup function which will result in a bug when
it tries to do the kfree(s->private).

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/staging/comedi/drivers/cb_pcimdda.c b/drivers/staging/comedi/drivers/cb_pcimdda.c
index b10831d3cf22..99a6160d3724 100644
--- a/drivers/staging/comedi/drivers/cb_pcimdda.c
+++ b/drivers/staging/comedi/drivers/cb_pcimdda.c
@@ -257,7 +257,7 @@ static void cb_pcimdda_detach(struct comedi_device *dev)
         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 
         if (dev->subdevices)
-                subdev_8255_cleanup(dev, dev->subdevices + 2);
+                subdev_8255_cleanup(dev, dev->subdevices + 1);
         if (pcidev) {
                 if (dev->iobase)
                         comedi_pci_disable(pcidev);