Staging: comedi: Allow 'open' driver method to fail

[pandora-kernel.git] / drivers / staging / comedi / drivers / dt9812.c

diff --git a/drivers/staging/comedi/drivers/dt9812.c b/drivers/staging/comedi/drivers/dt9812.c
index 96caae3..d01d2dc 100644 (file)
--- a/drivers/staging/comedi/drivers/dt9812.c
+++ b/drivers/staging/comedi/drivers/dt9812.c
@@ -890,8 +890,10 @@ static struct usb_driver dt9812_usb_driver = {
  * Comedi functions
  */
 
-static void dt9812_comedi_open(struct comedi_device *dev)
+static int dt9812_comedi_open(struct comedi_device *dev)
 {
+       int result = -ENODEV;
+
        down(&devpriv->slot->mutex);
        if (devpriv->slot->usb) {
                /* We have an attached device, fill in current range info */
@@ -934,8 +936,10 @@ static void dt9812_comedi_open(struct comedi_device *dev)
                        }
                        break;
                }
+               result = 0;
        }
        up(&devpriv->slot->mutex);
+       return result;
 }
 
 static int dt9812_di_rinsn(struct comedi_device *dev,