staging: comedi: pcmmio: return '0' after successful attach

The comedi core expects the (*attach) functions to return < 0 to indicate
an error or >= 0 for success. Change the return to '0' as that is more
typical.

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

diff --git a/drivers/staging/comedi/drivers/pcmmio.c b/drivers/staging/comedi/drivers/pcmmio.c
index f3cfe7b..6fd79a7 100644 (file)
--- a/drivers/staging/comedi/drivers/pcmmio.c
+++ b/drivers/staging/comedi/drivers/pcmmio.c
@@ -320,6 +320,7 @@ static void pcmmio_reset(struct comedi_device *dev)
        pcmmio_dio_write(dev, 0, PCMMIO_PAGE_INT_ID, 0);
 }
 
+/* devpriv->spinlock is already locked */
 static void pcmmio_stop_intr(struct comedi_device *dev,
                             struct comedi_subdevice *s)
 {
@@ -410,6 +411,7 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
        return IRQ_HANDLED;
 }
 
+/* devpriv->spinlock is already locked */
 static int pcmmio_start_intr(struct comedi_device *dev,
                             struct comedi_subdevice *s)
 {
@@ -842,7 +844,7 @@ static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        s->insn_bits    = pcmmio_dio_insn_bits;
        s->insn_config  = pcmmio_dio_insn_config;
 
-       return 1;
+       return 0;
 }
 
 static struct comedi_driver pcmmio_driver = {