49 	struct lcd_usb_data *lcd = &lcd_instance;  in open_lcd()  local
51 	if (lcd->isopen || !lcd->present) {  in open_lcd()
54 	lcd->isopen = 1;  in open_lcd()
56 	init_waitqueue_head(&lcd->wait_q);  in open_lcd()
65 	struct lcd_usb_data *lcd = &lcd_instance;  in close_lcd()  local
67 	lcd->isopen = 0;  in close_lcd()
77 	struct lcd_usb_data *lcd = &lcd_instance;  in ioctl_lcd()  local
82 	if (lcd == NULL ||  in ioctl_lcd()
83 	    lcd->present == 0 ||  in ioctl_lcd()
84 	    lcd->lcd_dev == NULL)  in ioctl_lcd()
89 		i = (lcd->lcd_dev)->descriptor.bcdDevice;  in ioctl_lcd()
112 	struct lcd_usb_data *lcd = &lcd_instance;  in write_lcd()  local
122 	if (lcd == NULL ||  in write_lcd()
123 	    lcd->present == 0 ||  in write_lcd()
124 	    lcd->lcd_dev == NULL)  in write_lcd()
129 		char *obuf = lcd->obuf;  in write_lcd()
133 		if (copy_from_user(lcd->obuf, buffer, copy_size))  in write_lcd()
137 			if (!lcd->lcd_dev)  in write_lcd()
143 			result = usb_bulk_msg(lcd->lcd_dev,  in write_lcd()
144 					 usb_sndbulkpipe(lcd->lcd_dev, 1),  in write_lcd()
154 				interruptible_sleep_on_timeout(&lcd-> wait_q, NAK_TIMEOUT);  in write_lcd()
177 	struct lcd_usb_data *lcd = &lcd_instance;  in read_lcd()  local
183 	char *ibuf = lcd->ibuf;  in read_lcd()
186 	if (lcd == NULL ||  in read_lcd()
187 	    lcd->present == 0 ||  in read_lcd()
188 	    lcd->lcd_dev == NULL)  in read_lcd()
197 		if (!lcd->lcd_dev)  in read_lcd()
201 		result = usb_bulk_msg(lcd->lcd_dev,  in read_lcd()
202 				      usb_rcvbulkpipe(lcd->lcd_dev, 0),  in read_lcd()
216 			interruptible_sleep_on_timeout(&lcd->wait_q,  in read_lcd()
240 	struct lcd_usb_data *lcd = &lcd_instance;  in probe_lcd()  local
248 	if (lcd->present == 1) {  in probe_lcd()
259 	lcd->present = 1;  in probe_lcd()
260 	lcd->lcd_dev = dev;  in probe_lcd()
262 	if (!(lcd->obuf = (char *) kmalloc(OBUF_SIZE, GFP_KERNEL))) {  in probe_lcd()
266 	dbg("probe_lcd: obuf address:%p", lcd->obuf);  in probe_lcd()
268 	if (!(lcd->ibuf = (char *) kmalloc(IBUF_SIZE, GFP_KERNEL))) {  in probe_lcd()
270 		kfree(lcd->obuf);  in probe_lcd()
273 	dbg("probe_lcd: ibuf address:%p", lcd->ibuf);  in probe_lcd()
275 	return lcd;  in probe_lcd()
280 	struct lcd_usb_data *lcd = (struct lcd_usb_data *) ptr;  in disconnect_lcd()  local
282 	if (lcd->isopen) {  in disconnect_lcd()
283 		lcd->isopen = 0;  in disconnect_lcd()
285 		lcd->lcd_dev = NULL;  in disconnect_lcd()
288 	kfree(lcd->ibuf);  in disconnect_lcd()
289 	kfree(lcd->obuf);  in disconnect_lcd()
293 	lcd->present = 0;  in disconnect_lcd()
336 	struct lcd_usb_data *lcd = &lcd_instance;  in usb_lcd_cleanup()  local
338 	lcd->present = 0;  in usb_lcd_cleanup()