staging: comedi: usbdux: remove usb_device back pointer from private data

The usb_device can be found when needed using the comedi_to_usb_dev()
helper. Use that instead the remove the back pointer 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 c3fbfdc6fc5c4e5243d776537e0874c653ecb724..88419444497fd965468b33d1d44ffc2327f8e330 100644 (file)
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -202,8 +202,6 @@ static const struct comedi_lrange range_usbdux_ao_range = {
 };
 
 struct usbdux_private {
-       /* pointer to the usb-device */
-       struct usb_device *usbdev;
        /* actual number of in-buffers */
        int num_in_buffers;
        /* actual number of out-buffers */
@@ -384,7 +382,7 @@ static void usbduxsub_ai_isoc_irq(struct urb *urb)
                return;
        }
 
-       urb->dev = devpriv->usbdev;
+       urb->dev = comedi_to_usb_dev(dev);
 
        /* resubmit the urb */
        err = usb_submit_urb(urb, GFP_ATOMIC);
@@ -587,7 +585,7 @@ static void usbduxsub_ao_isoc_irq(struct urb *urb)
                }
        }
        urb->transfer_buffer_length = SIZEOUTBUF;
-       urb->dev = devpriv->usbdev;
+       urb->dev = comedi_to_usb_dev(dev);
        urb->status = 0;
        if (devpriv->ao_cmd_running) {
                if (devpriv->high_speed)
@@ -622,8 +620,7 @@ static int usbdux_firmware_upload(struct comedi_device *dev,
                                  const u8 *data, size_t size,
                                  unsigned long context)
 {
-       struct usbdux_private *usbduxsub = dev->private;
-       struct usb_device *usb = usbduxsub->usbdev;
+       struct usb_device *usb = comedi_to_usb_dev(dev);
        uint8_t *buf;
        uint8_t *tmp;
        int ret;
@@ -693,6 +690,7 @@ done:
 
 static int usbduxsub_submit_inurbs(struct comedi_device *dev)
 {
+       struct usb_device *usb = comedi_to_usb_dev(dev);
        struct usbdux_private *devpriv = dev->private;
        struct urb *urb;
        int ret;
@@ -705,7 +703,7 @@ static int usbduxsub_submit_inurbs(struct comedi_device *dev)
                /* in case of a resubmission after an unlink... */
                urb->interval = devpriv->ai_interval;
                urb->context = dev;
-               urb->dev = devpriv->usbdev;
+               urb->dev = usb;
                urb->status = 0;
                urb->transfer_flags = URB_ISO_ASAP;
 
@@ -718,6 +716,7 @@ static int usbduxsub_submit_inurbs(struct comedi_device *dev)
 
 static int usbduxsub_submit_outurbs(struct comedi_device *dev)
 {
+       struct usb_device *usb = comedi_to_usb_dev(dev);
        struct usbdux_private *devpriv = dev->private;
        struct urb *urb;
        int ret;
@@ -728,7 +727,7 @@ static int usbduxsub_submit_outurbs(struct comedi_device *dev)
 
                /* in case of a resubmission after an unlink... */
                urb->context = dev;
-               urb->dev = devpriv->usbdev;
+               urb->dev = usb;
                urb->status = 0;
                urb->transfer_flags = URB_ISO_ASAP;
 
@@ -849,8 +848,8 @@ static int8_t create_adc_command(unsigned int chan, int range)
 
 static int send_dux_commands(struct comedi_device *dev, int cmd_type)
 {
+       struct usb_device *usb = comedi_to_usb_dev(dev);
        struct usbdux_private *devpriv = dev->private;
-       struct usb_device *usb = devpriv->usbdev;
        int nsent;
 
        devpriv->dux_commands[0] = cmd_type;
@@ -862,8 +861,8 @@ static int send_dux_commands(struct comedi_device *dev, int cmd_type)
 
 static int receive_dux_commands(struct comedi_device *dev, int command)
 {
+       struct usb_device *usb = comedi_to_usb_dev(dev);
        struct usbdux_private *devpriv = dev->private;
-       struct usb_device *usb = devpriv->usbdev;
        int ret;
        int nrec;
        int i;
@@ -1520,7 +1519,7 @@ static void usbduxsub_pwm_irq(struct urb *urb)
                return;
 
        urb->transfer_buffer_length = devpriv->size_pwm_buf;
-       urb->dev = devpriv->usbdev;
+       urb->dev = comedi_to_usb_dev(dev);
        urb->status = 0;
        if (devpriv->pwm_cmd_running) {
                ret = usb_submit_urb(urb, GFP_ATOMIC);
@@ -1540,12 +1539,12 @@ static void usbduxsub_pwm_irq(struct urb *urb)
 
 static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev)
 {
+       struct usb_device *usb = comedi_to_usb_dev(dev);
        struct usbdux_private *devpriv = dev->private;
        struct urb *urb = devpriv->urb_pwm;
 
        /* in case of a resubmission after an unlink... */
-       usb_fill_bulk_urb(urb, devpriv->usbdev,
-                         usb_sndbulkpipe(devpriv->usbdev, PWM_EP),
+       usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, PWM_EP),
                          urb->transfer_buffer,
                          devpriv->size_pwm_buf,
                          usbduxsub_pwm_irq,
@@ -1731,6 +1730,7 @@ static int usbdux_pwm_config(struct comedi_device *dev,
 
 static int usbdux_alloc_usb_buffers(struct comedi_device *dev)
 {
+       struct usb_device *usb = comedi_to_usb_dev(dev);
        struct usbdux_private *devpriv = dev->private;
        struct urb *urb;
        int i;
@@ -1773,11 +1773,11 @@ static int usbdux_alloc_usb_buffers(struct comedi_device *dev)
                        return -ENOMEM;
                devpriv->urb_in[i] = urb;
 
-               urb->dev = devpriv->usbdev;
+               urb->dev = usb;
                /* will be filled later with a pointer to the comedi-device */
                /* and ONLY then the urb should be submitted */
                urb->context = NULL;
-               urb->pipe = usb_rcvisocpipe(devpriv->usbdev, ISOINEP);
+               urb->pipe = usb_rcvisocpipe(usb, ISOINEP);
                urb->transfer_flags = URB_ISO_ASAP;
                urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
                if (!urb->transfer_buffer)
@@ -1803,11 +1803,11 @@ static int usbdux_alloc_usb_buffers(struct comedi_device *dev)
                        return -ENOMEM;
                devpriv->urb_out[i] = urb;
 
-               urb->dev = devpriv->usbdev;
+               urb->dev = usb;
                /* will be filled later with a pointer to the comedi-device */
                /* and ONLY then the urb should be submitted */
                urb->context = NULL;
-               urb->pipe = usb_sndisocpipe(devpriv->usbdev, ISOOUTEP);
+               urb->pipe = usb_sndisocpipe(usb, ISOOUTEP);
                urb->transfer_flags = URB_ISO_ASAP;
                urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
                if (!urb->transfer_buffer)
@@ -1896,11 +1896,10 @@ static int usbdux_auto_attach(struct comedi_device *dev,
 
        sema_init(&devpriv->sem, 1);
 
-       devpriv->usbdev = usb;
        devpriv->ifnum = intf->altsetting->desc.bInterfaceNumber;
        usb_set_intfdata(intf, devpriv);
 
-       devpriv->high_speed = (devpriv->usbdev->speed == USB_SPEED_HIGH);
+       devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
        if (devpriv->high_speed) {
                devpriv->num_in_buffers = NUMOFINBUFFERSHIGH;
                devpriv->num_out_buffers = NUMOFOUTBUFFERSHIGH;
@@ -1915,7 +1914,7 @@ 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(devpriv->usbdev, devpriv->ifnum, 3);
+       ret = usb_set_interface(usb, devpriv->ifnum, 3);
        if (ret < 0) {
                dev_err(dev->class_dev,
                        "could not set alternate setting 3 in high speed\n");