staging: comedi: usbdux: remove 'ifnum' from the private data

The 'ifnum' is only used during the attach of the device. Remove it
from the private data.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: 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 88419444497fd965468b33d1d44ffc2327f8e330..c0c4a27116644f1816d2fd93658900cb2ff73e95 100644 (file)
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -223,8 +223,6 @@ struct usbdux_private {
        int16_t *insn_buffer;
        /* output buffer for single DA outputs */
        int16_t *out_buffer;
-       /* interface number */
-       int ifnum;
        /* is it USB_SPEED_HIGH or not? */
        short int high_speed;
        /* asynchronous command is running */
@@ -1896,7 +1894,6 @@ static int usbdux_auto_attach(struct comedi_device *dev,
 
        sema_init(&devpriv->sem, 1);
 
-       devpriv->ifnum = intf->altsetting->desc.bInterfaceNumber;
        usb_set_intfdata(intf, devpriv);
 
        devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
@@ -1914,7 +1911,8 @@ static int usbdux_auto_attach(struct comedi_device *dev,
                return ret;
 
        /* setting to alternate setting 3: enabling iso ep and bulk ep. */
-       ret = usb_set_interface(usb, devpriv->ifnum, 3);
+       ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber,
+                               3);
        if (ret < 0) {
                dev_err(dev->class_dev,
                        "could not set alternate setting 3 in high speed\n");