Input: pxrc - do not store unneeded data in driver structure

There is no need to store data buffer size, pointer to the buffer, or endpoint
address in pxrc structure, as they are either only needed during setup, or are
available from elsewhere.

Reviewed-by: Marcus Folkesson <[e-mail]>
Tested-by: Marcus Folkesson <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/joystick/pxrc.c

···
 	struct urb		*urb;
 	struct mutex		pm_mutex;
 	bool			is_open;
-	__u8			epaddr;
 	char			phys[64];
-	unsigned char           *data;
-	size_t			bsize;
 };
 
 static void pxrc_usb_irq(struct urb *urb)
 {
 	struct pxrc *pxrc = urb->context;
+	u8 *data = urb->transfer_buffer;
 	int error;
 
 	switch (urb->status) {
···
 	}
 
 	if (urb->actual_length == 8) {
-		input_report_abs(pxrc->input, ABS_X, pxrc->data[0]);
-		input_report_abs(pxrc->input, ABS_Y, pxrc->data[2]);
-		input_report_abs(pxrc->input, ABS_RX, pxrc->data[3]);
-		input_report_abs(pxrc->input, ABS_RY, pxrc->data[4]);
-		input_report_abs(pxrc->input, ABS_RUDDER, pxrc->data[5]);
-		input_report_abs(pxrc->input, ABS_THROTTLE, pxrc->data[6]);
-		input_report_abs(pxrc->input, ABS_MISC, pxrc->data[7]);
+		input_report_abs(pxrc->input, ABS_X, data[0]);
+		input_report_abs(pxrc->input, ABS_Y, data[2]);
+		input_report_abs(pxrc->input, ABS_RX, data[3]);
+		input_report_abs(pxrc->input, ABS_RY, data[4]);
+		input_report_abs(pxrc->input, ABS_RUDDER, data[5]);
+		input_report_abs(pxrc->input, ABS_THROTTLE, data[6]);
+		input_report_abs(pxrc->input, ABS_MISC, data[7]);
 
-		input_report_key(pxrc->input, BTN_A, pxrc->data[1]);
+		input_report_key(pxrc->input, BTN_A, data[1]);
 	}
 
 exit:
···
 {
 	struct usb_device *udev = interface_to_usbdev(pxrc->intf);
 	struct usb_endpoint_descriptor *epirq;
+	size_t xfer_size;
+	void *xfer_buf;
 	unsigned int pipe;
 	int error;
 
···
 		return error;
 	}
 
-	pxrc->bsize = usb_endpoint_maxp(epirq);
-	pxrc->epaddr = epirq->bEndpointAddress;
-	pxrc->data = devm_kmalloc(&pxrc->intf->dev, pxrc->bsize, GFP_KERNEL);
-	if (!pxrc->data)
+	xfer_size = usb_endpoint_maxp(epirq);
+	xfer_buf = devm_kmalloc(&pxrc->intf->dev, xfer_size, GFP_KERNEL);
+	if (!xfer_buf)
 		return -ENOMEM;
 
 	usb_set_intfdata(pxrc->intf, pxrc);
···
 	if (error)
 		return error;
 
-	pipe = usb_rcvintpipe(udev, pxrc->epaddr),
-	usb_fill_int_urb(pxrc->urb, udev, pipe, pxrc->data, pxrc->bsize,
+	pipe = usb_rcvintpipe(udev, epirq->bEndpointAddress),
+	usb_fill_int_urb(pxrc->urb, udev, pipe, xfer_buf, xfer_size,
 			 pxrc_usb_irq, pxrc, 1);
 
 	return 0;