staging: comedi: usbduxsigma: remove usbdux_pwm_read()

[~andy/linux] / drivers / staging / comedi / drivers / usbduxsigma.c

diff --git a/drivers/staging/comedi/drivers/usbduxsigma.c b/drivers/staging/comedi/drivers/usbduxsigma.c
index f96e0a77194bd2159be81720cf88e8a30c2688ff..83d7b61e1c905c65c826f4ea49c290d04912bcf8 100644 (file)
--- a/drivers/staging/comedi/drivers/usbduxsigma.c
+++ b/drivers/staging/comedi/drivers/usbduxsigma.c
@@ -1386,14 +1386,6 @@ static int usbdux_pwm_write(struct comedi_device *dev,
        return usbdux_pwm_pattern(dev, s, CR_CHAN(insn->chanspec), data[0], 0);
 }
 
-static int usbdux_pwm_read(struct comedi_device *x1,
-                          struct comedi_subdevice *x2, struct comedi_insn *x3,
-                          unsigned int *x4)
-{
-       /* not needed */
-       return -EINVAL;
-};
-
 static int usbduxsigma_pwm_config(struct comedi_device *dev,
                                  struct comedi_subdevice *s,
                                  struct comedi_insn *insn,
@@ -1552,7 +1544,6 @@ static int usbduxsigma_attach_common(struct comedi_device *dev)
                s->n_chan       = 8;
                s->maxdata      = devpriv->sizePwmBuf;
                s->insn_write   = usbdux_pwm_write;
-               s->insn_read    = usbdux_pwm_read;
                s->insn_config  = usbduxsigma_pwm_config;
 
                usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);