staging: comedi: usbdux: remove usbdux_pwm_read()

The pwm subdevice is not readable so this callback function is not
needed. Remove it.

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/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c
index 214a49f23ec560b902d030aa71bd43c829324f14..9f97e3e1f1c69461a6a5feaa3464298ef0303965 100644 (file)
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -1445,14 +1445,6 @@ static int usbdux_pwm_write(struct comedi_device *dev,
        return usbdux_pwm_pattern(dev, s, chan, 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;
-};
-
 /* switches on/off PWM */
 static int usbdux_pwm_config(struct comedi_device *dev,
                             struct comedi_subdevice *s,
@@ -1819,7 +1811,6 @@ static int usbdux_auto_attach(struct comedi_device *dev,
                s->n_chan       = 8;
                s->maxdata      = devpriv->pwm_buf_sz;
                s->insn_write   = usbdux_pwm_write;
-               s->insn_read    = usbdux_pwm_read;
                s->insn_config  = usbdux_pwm_config;
 
                usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);