diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/dt9812.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/dt9812.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/staging/comedi/drivers/dt9812.c b/drivers/staging/comedi/drivers/dt9812.c index 96caae36279c..d01d2dc79112 100644 --- 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, |