Input: usbtouchscreen - convert from usb_device to usb_interface

Convert usbtouchscreen from storing usb_device to usb_interface. This is
needed for multi-interface touchscreen devices such as iNexio.
Signed-off-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/usbtouchscreen.c

@@ -104,7 +104,7 @@ struct usbtouch_usb {
 	unsigned char *buffer;
 	int buf_len;
 	struct urb *irq;
-	struct usb_device *udev;
+	struct usb_interface *interface;
 	struct input_dev *input;
 	struct usbtouch_device_info *type;
 	char name[128];
@@ -234,8 +234,9 @@ static const struct usb_device_id usbtouch_devices[] = {
 static int e2i_init(struct usbtouch_usb *usbtouch)
 {
 	int ret;
+	struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 
-	ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 	                      0x01, 0x02, 0x0000, 0x0081,
 	                      NULL, 0, USB_CTRL_SET_TIMEOUT);
 
@@ -344,8 +345,9 @@ static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 static int mtouch_init(struct usbtouch_usb *usbtouch)
 {
 	int ret, i;
+	struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 
-	ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 	                      MTOUCHUSB_RESET,
 	                      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 	                      1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
@@ -356,7 +358,7 @@ static int mtouch_init(struct usbtouch_usb *usbtouch)
 	msleep(150);
 
 	for (i = 0; i < 3; i++) {
-		ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
+		ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 				      MTOUCHUSB_ASYNC_REPORT,
 				      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 				      1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
@@ -489,7 +491,7 @@ static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 
 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 {
-	struct usb_device *dev = usbtouch->udev;
+	struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 	int ret = -ENOMEM;
 	unsigned char *buf;
 
@@ -1021,7 +1023,7 @@ static int usbtouch_open(struct input_dev *input)
 {
 	struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 
-	usbtouch->irq->dev = usbtouch->udev;
+	usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
 
 	if (!usbtouch->type->irq_always) {
 		if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
@@ -1094,7 +1096,7 @@ static int usbtouch_probe(struct usb_interface *intf,
 		goto out_free_buffers;
 	}
 
-	usbtouch->udev = udev;
+	usbtouch->interface = intf;
 	usbtouch->input = input_dev;
 
 	if (udev->manufacturer)
@@ -1133,12 +1135,12 @@ static int usbtouch_probe(struct usb_interface *intf,
 		input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 		                     type->max_press, 0, 0);
 
-	usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
-			 usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
+	usb_fill_int_urb(usbtouch->irq, udev,
+			 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
 			 usbtouch->data, type->rept_size,
 			 usbtouch_irq, usbtouch, endpoint->bInterval);
 
-	usbtouch->irq->dev = usbtouch->udev;
+	usbtouch->irq->dev = udev;
 	usbtouch->irq->transfer_dma = usbtouch->data_dma;
 	usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;