118 	struct usbtmc_device_data *data;  member
134 	struct usbtmc_device_data *data = to_usbtmc_data(kref);  in usbtmc_delete()  local
136 	usb_put_dev(data->usb_dev);  in usbtmc_delete()
137 	kfree(data);  in usbtmc_delete()
143 	struct usbtmc_device_data *data;  in usbtmc_open()  local
156 	data = usb_get_intfdata(intf);  in usbtmc_open()
158 	kref_get(&data->kref);  in usbtmc_open()
160 	mutex_lock(&data->io_mutex);  in usbtmc_open()
161 	file_data->data = data;  in usbtmc_open()
165 	file_data->term_char = data->TermChar;  in usbtmc_open()
166 	file_data->term_char_enabled = data->TermCharEnabled;  in usbtmc_open()
170 	spin_lock_irq(&data->dev_lock);  in usbtmc_open()
171 	list_add_tail(&file_data->file_elem, &data->file_list);  in usbtmc_open()
172 	spin_unlock_irq(&data->dev_lock);  in usbtmc_open()
173 	mutex_unlock(&data->io_mutex);  in usbtmc_open()
186 	mutex_lock(&file_data->data->io_mutex);  in usbtmc_release()
187 	spin_lock_irq(&file_data->data->dev_lock);  in usbtmc_release()
191 	spin_unlock_irq(&file_data->data->dev_lock);  in usbtmc_release()
192 	mutex_unlock(&file_data->data->io_mutex);  in usbtmc_release()
194 	kref_put(&file_data->data->kref, usbtmc_delete);  in usbtmc_release()
195 	file_data->data = NULL;  in usbtmc_release()
200 static int usbtmc_ioctl_abort_bulk_in(struct usbtmc_device_data *data)  in usbtmc_ioctl_abort_bulk_in()  argument
210 	dev = &data->intf->dev;  in usbtmc_ioctl_abort_bulk_in()
215 	rv = usb_control_msg(data->usb_dev,  in usbtmc_ioctl_abort_bulk_in()
216 			     usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc_ioctl_abort_bulk_in()
219 			     data->bTag_last_read, data->bulk_in,  in usbtmc_ioctl_abort_bulk_in()
242 	current_setting = data->intf->cur_altsetting;  in usbtmc_ioctl_abort_bulk_in()
245 			data->bulk_in)  in usbtmc_ioctl_abort_bulk_in()
254 	dev_dbg(&data->intf->dev, "wMaxPacketSize is %d\n", max_size);  in usbtmc_ioctl_abort_bulk_in()
261 		rv = usb_bulk_msg(data->usb_dev,  in usbtmc_ioctl_abort_bulk_in()
262 				  usb_rcvbulkpipe(data->usb_dev,  in usbtmc_ioctl_abort_bulk_in()
263 						  data->bulk_in),  in usbtmc_ioctl_abort_bulk_in()
286 	rv = usb_control_msg(data->usb_dev,  in usbtmc_ioctl_abort_bulk_in()
287 			     usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc_ioctl_abort_bulk_in()
290 			     0, data->bulk_in, buffer, 0x08,  in usbtmc_ioctl_abort_bulk_in()
315 			rv = usb_bulk_msg(data->usb_dev,  in usbtmc_ioctl_abort_bulk_in()
316 					  usb_rcvbulkpipe(data->usb_dev,  in usbtmc_ioctl_abort_bulk_in()
317 							  data->bulk_in),  in usbtmc_ioctl_abort_bulk_in()
345 static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data)  in usbtmc_ioctl_abort_bulk_out()  argument
352 	dev = &data->intf->dev;  in usbtmc_ioctl_abort_bulk_out()
358 	rv = usb_control_msg(data->usb_dev,  in usbtmc_ioctl_abort_bulk_out()
359 			     usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc_ioctl_abort_bulk_out()
362 			     data->bTag_last_write, data->bulk_out,  in usbtmc_ioctl_abort_bulk_out()
382 	rv = usb_control_msg(data->usb_dev,  in usbtmc_ioctl_abort_bulk_out()
383 			     usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc_ioctl_abort_bulk_out()
386 			     0, data->bulk_out, buffer, 0x08,  in usbtmc_ioctl_abort_bulk_out()
407 	rv = usb_clear_halt(data->usb_dev,  in usbtmc_ioctl_abort_bulk_out()
408 			    usb_sndbulkpipe(data->usb_dev, data->bulk_out));  in usbtmc_ioctl_abort_bulk_out()
424 	struct usbtmc_device_data *data = file_data->data;  in usbtmc488_ioctl_read_stb()  local
425 	struct device *dev = &data->intf->dev;  in usbtmc488_ioctl_read_stb()
433 		data->iin_ep_present);  in usbtmc488_ioctl_read_stb()
435 	spin_lock_irq(&data->dev_lock);  in usbtmc488_ioctl_read_stb()
440 		spin_unlock_irq(&data->dev_lock);  in usbtmc488_ioctl_read_stb()
446 	spin_unlock_irq(&data->dev_lock);  in usbtmc488_ioctl_read_stb()
452 	atomic_set(&data->iin_data_valid, 0);  in usbtmc488_ioctl_read_stb()
454 	rv = usb_control_msg(data->usb_dev,  in usbtmc488_ioctl_read_stb()
455 			usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc488_ioctl_read_stb()
458 			data->iin_bTag,  in usbtmc488_ioctl_read_stb()
459 			data->ifnum,  in usbtmc488_ioctl_read_stb()
472 	if (data->iin_ep_present) {  in usbtmc488_ioctl_read_stb()
474 			data->waitq,  in usbtmc488_ioctl_read_stb()
475 			atomic_read(&data->iin_data_valid) != 0,  in usbtmc488_ioctl_read_stb()
488 		tag = data->bNotify1 & 0x7f;  in usbtmc488_ioctl_read_stb()
489 		if (tag != data->iin_bTag) {  in usbtmc488_ioctl_read_stb()
491 				data->iin_bTag, tag);  in usbtmc488_ioctl_read_stb()
494 		stb = data->bNotify2;  in usbtmc488_ioctl_read_stb()
504 	data->iin_bTag += 1;  in usbtmc488_ioctl_read_stb()
505 	if (data->iin_bTag > 127)  in usbtmc488_ioctl_read_stb()
507 		data->iin_bTag = 2;  in usbtmc488_ioctl_read_stb()
513 static int usbtmc488_ioctl_simple(struct usbtmc_device_data *data,  in usbtmc488_ioctl_simple()  argument
516 	struct device *dev = &data->intf->dev;  in usbtmc488_ioctl_simple()
522 	if (!(data->usb488_caps & USBTMC488_CAPABILITY_SIMPLE))  in usbtmc488_ioctl_simple()
540 	rv = usb_control_msg(data->usb_dev,  in usbtmc488_ioctl_simple()
541 			usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc488_ioctl_simple()
545 			data->ifnum,  in usbtmc488_ioctl_simple()
576 	struct usbtmc_device_data *data = file_data->data;  in usbtmc488_ioctl_trigger()  local
586 	buffer[1] = data->bTag;  in usbtmc488_ioctl_trigger()
587 	buffer[2] = ~data->bTag;  in usbtmc488_ioctl_trigger()
589 	retval = usb_bulk_msg(data->usb_dev,  in usbtmc488_ioctl_trigger()
590 			      usb_sndbulkpipe(data->usb_dev,  in usbtmc488_ioctl_trigger()
591 					      data->bulk_out),  in usbtmc488_ioctl_trigger()
596 	data->bTag_last_write = data->bTag;  in usbtmc488_ioctl_trigger()
599 	data->bTag++;  in usbtmc488_ioctl_trigger()
600 	if (!data->bTag)  in usbtmc488_ioctl_trigger()
601 		data->bTag++;  in usbtmc488_ioctl_trigger()
605 		dev_err(&data->intf->dev, "%s returned %d\n",  in usbtmc488_ioctl_trigger()
624 	struct usbtmc_device_data *data = file_data->data;  in send_request_dev_dep_msg_in()  local
636 	buffer[1] = data->bTag;  in send_request_dev_dep_msg_in()
637 	buffer[2] = ~data->bTag;  in send_request_dev_dep_msg_in()
650 	retval = usb_bulk_msg(data->usb_dev,  in send_request_dev_dep_msg_in()
651 			      usb_sndbulkpipe(data->usb_dev,  in send_request_dev_dep_msg_in()
652 					      data->bulk_out),  in send_request_dev_dep_msg_in()
657 	data->bTag_last_write = data->bTag;  in send_request_dev_dep_msg_in()
660 	data->bTag++;  in send_request_dev_dep_msg_in()
661 	if (!data->bTag)  in send_request_dev_dep_msg_in()
662 		data->bTag++;  in send_request_dev_dep_msg_in()
666 		dev_err(&data->intf->dev, "usb_bulk_msg in send_request_dev_dep_msg_in() returned %d\n", retval);  in send_request_dev_dep_msg_in()
677 	struct usbtmc_device_data *data;  in usbtmc_read()  local
689 	data = file_data->data;  in usbtmc_read()
690 	dev = &data->intf->dev;  in usbtmc_read()
696 	mutex_lock(&data->io_mutex);  in usbtmc_read()
697 	if (data->zombie) {  in usbtmc_read()
707 		if (data->auto_abort)  in usbtmc_read()
708 			usbtmc_ioctl_abort_bulk_out(data);  in usbtmc_read()
719 		retval = usb_bulk_msg(data->usb_dev,  in usbtmc_read()
720 				      usb_rcvbulkpipe(data->usb_dev,  in usbtmc_read()
721 						      data->bulk_in),  in usbtmc_read()
728 		data->bTag_last_read = data->bTag;  in usbtmc_read()
732 			if (data->auto_abort)  in usbtmc_read()
733 				usbtmc_ioctl_abort_bulk_in(data);  in usbtmc_read()
742 				if (data->auto_abort)  in usbtmc_read()
743 					usbtmc_ioctl_abort_bulk_in(data);  in usbtmc_read()
749 				if (data->auto_abort)  in usbtmc_read()
750 					usbtmc_ioctl_abort_bulk_in(data);  in usbtmc_read()
754 			if (buffer[1] != data->bTag_last_write) {  in usbtmc_read()
755 				dev_err(dev, "Device sent reply with wrong bTag: %u != %u\n", buffer[1], data->bTag_last_write);  in usbtmc_read()
756 				if (data->auto_abort)  in usbtmc_read()
757 					usbtmc_ioctl_abort_bulk_in(data);  in usbtmc_read()
769 				if (data->auto_abort)  in usbtmc_read()
770 					usbtmc_ioctl_abort_bulk_in(data);  in usbtmc_read()
826 	mutex_unlock(&data->io_mutex);  in usbtmc_read()
835 	struct usbtmc_device_data *data;  in usbtmc_write()  local
845 	data = file_data->data;  in usbtmc_write()
851 	mutex_lock(&data->io_mutex);  in usbtmc_write()
852 	if (data->zombie) {  in usbtmc_write()
871 		buffer[1] = data->bTag;  in usbtmc_write()
872 		buffer[2] = ~data->bTag;  in usbtmc_write()
892 			retval = usb_bulk_msg(data->usb_dev,  in usbtmc_write()
893 					      usb_sndbulkpipe(data->usb_dev,  in usbtmc_write()
894 							      data->bulk_out),  in usbtmc_write()
902 		data->bTag_last_write = data->bTag;  in usbtmc_write()
903 		data->bTag++;  in usbtmc_write()
905 		if (!data->bTag)  in usbtmc_write()
906 			data->bTag++;  in usbtmc_write()
909 			dev_err(&data->intf->dev,  in usbtmc_write()
911 			if (data->auto_abort)  in usbtmc_write()
912 				usbtmc_ioctl_abort_bulk_out(data);  in usbtmc_write()
922 	mutex_unlock(&data->io_mutex);  in usbtmc_write()
927 static int usbtmc_ioctl_clear(struct usbtmc_device_data *data)  in usbtmc_ioctl_clear()  argument
938 	dev = &data->intf->dev;  in usbtmc_ioctl_clear()
946 	rv = usb_control_msg(data->usb_dev,  in usbtmc_ioctl_clear()
947 			     usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc_ioctl_clear()
965 	current_setting = data->intf->cur_altsetting;  in usbtmc_ioctl_clear()
968 		if (desc->bEndpointAddress == data->bulk_in)  in usbtmc_ioctl_clear()
986 	rv = usb_control_msg(data->usb_dev,  in usbtmc_ioctl_clear()
987 			     usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc_ioctl_clear()
1011 			rv = usb_bulk_msg(data->usb_dev,  in usbtmc_ioctl_clear()
1012 					  usb_rcvbulkpipe(data->usb_dev,  in usbtmc_ioctl_clear()
1013 							  data->bulk_in),  in usbtmc_ioctl_clear()
1037 	rv = usb_clear_halt(data->usb_dev,  in usbtmc_ioctl_clear()
1038 			    usb_sndbulkpipe(data->usb_dev, data->bulk_out));  in usbtmc_ioctl_clear()
1050 static int usbtmc_ioctl_clear_out_halt(struct usbtmc_device_data *data)  in usbtmc_ioctl_clear_out_halt()  argument
1054 	rv = usb_clear_halt(data->usb_dev,  in usbtmc_ioctl_clear_out_halt()
1055 			    usb_sndbulkpipe(data->usb_dev, data->bulk_out));  in usbtmc_ioctl_clear_out_halt()
1058 		dev_err(&data->usb_dev->dev, "usb_control_msg returned %d\n",  in usbtmc_ioctl_clear_out_halt()
1065 static int usbtmc_ioctl_clear_in_halt(struct usbtmc_device_data *data)  in usbtmc_ioctl_clear_in_halt()  argument
1069 	rv = usb_clear_halt(data->usb_dev,  in usbtmc_ioctl_clear_in_halt()
1070 			    usb_rcvbulkpipe(data->usb_dev, data->bulk_in));  in usbtmc_ioctl_clear_in_halt()
1073 		dev_err(&data->usb_dev->dev, "usb_control_msg returned %d\n",  in usbtmc_ioctl_clear_in_halt()
1080 static int get_capabilities(struct usbtmc_device_data *data)  in get_capabilities()  argument
1082 	struct device *dev = &data->usb_dev->dev;  in get_capabilities()
1090 	rv = usb_control_msg(data->usb_dev, usb_rcvctrlpipe(data->usb_dev, 0),  in get_capabilities()
1110 	data->capabilities.interface_capabilities = buffer[4];  in get_capabilities()
1111 	data->capabilities.device_capabilities = buffer[5];  in get_capabilities()
1112 	data->capabilities.usb488_interface_capabilities = buffer[14];  in get_capabilities()
1113 	data->capabilities.usb488_device_capabilities = buffer[15];  in get_capabilities()
1114 	data->usb488_caps = (buffer[14] & 0x07) | ((buffer[15] & 0x0f) << 4);  in get_capabilities()
1127 	struct usbtmc_device_data *data = usb_get_intfdata(intf);	\
1129 	return sprintf(buf, "%d\n", data->capabilities.name);		\
1154 	struct usbtmc_device_data *data = usb_get_intfdata(intf);  in TermChar_show()  local
1156 	return sprintf(buf, "%c\n", data->TermChar);  in TermChar_show()
1164 	struct usbtmc_device_data *data = usb_get_intfdata(intf);  in TermChar_store()  local
1168 	data->TermChar = buf[0];  in TermChar_store()
1178 	struct usbtmc_device_data *data = usb_get_intfdata(intf);	\
1180 	return sprintf(buf, "%d\n", data->name);			\
1187 	struct usbtmc_device_data *data = usb_get_intfdata(intf);	\
1194 	data->name = val;						\
1216 static int usbtmc_ioctl_indicator_pulse(struct usbtmc_device_data *data)  in usbtmc_ioctl_indicator_pulse()  argument
1222 	dev = &data->intf->dev;  in usbtmc_ioctl_indicator_pulse()
1228 	rv = usb_control_msg(data->usb_dev,  in usbtmc_ioctl_indicator_pulse()
1229 			     usb_rcvctrlpipe(data->usb_dev, 0),  in usbtmc_ioctl_indicator_pulse()
1320 		!(file_data->data->capabilities.device_capabilities & 1)))  in usbtmc_ioctl_config_termc()
1332 	struct usbtmc_device_data *data;  in usbtmc_ioctl()  local
1336 	data = file_data->data;  in usbtmc_ioctl()
1338 	mutex_lock(&data->io_mutex);  in usbtmc_ioctl()
1339 	if (data->zombie) {  in usbtmc_ioctl()
1346 		retval = usbtmc_ioctl_clear_out_halt(data);  in usbtmc_ioctl()
1350 		retval = usbtmc_ioctl_clear_in_halt(data);  in usbtmc_ioctl()
1354 		retval = usbtmc_ioctl_indicator_pulse(data);  in usbtmc_ioctl()
1358 		retval = usbtmc_ioctl_clear(data);  in usbtmc_ioctl()
1362 		retval = usbtmc_ioctl_abort_bulk_out(data);  in usbtmc_ioctl()
1366 		retval = usbtmc_ioctl_abort_bulk_in(data);  in usbtmc_ioctl()
1391 				&data->usb488_caps,  in usbtmc_ioctl()
1392 				sizeof(data->usb488_caps));  in usbtmc_ioctl()
1403 		retval = usbtmc488_ioctl_simple(data, (void __user *)arg,  in usbtmc_ioctl()
1408 		retval = usbtmc488_ioctl_simple(data, (void __user *)arg,  in usbtmc_ioctl()
1413 		retval = usbtmc488_ioctl_simple(data, (void __user *)arg,  in usbtmc_ioctl()
1423 	mutex_unlock(&data->io_mutex);  in usbtmc_ioctl()
1431 	return fasync_helper(fd, file, on, &file_data->data->fasync);  in usbtmc_fasync()
1437 	struct usbtmc_device_data *data = file_data->data;  in usbtmc_poll()  local
1440 	mutex_lock(&data->io_mutex);  in usbtmc_poll()
1442 	if (data->zombie) {  in usbtmc_poll()
1447 	poll_wait(file, &data->waitq, wait);  in usbtmc_poll()
1452 	mutex_unlock(&data->io_mutex);  in usbtmc_poll()
1479 	struct usbtmc_device_data *data = urb->context;  in usbtmc_interrupt()  local
1480 	struct device *dev = &data->intf->dev;  in usbtmc_interrupt()
1484 	dev_dbg(&data->intf->dev, "int status: %d len %d\n",  in usbtmc_interrupt()
1490 		if (data->iin_buffer[0] > 0x81) {  in usbtmc_interrupt()
1491 			data->bNotify1 = data->iin_buffer[0];  in usbtmc_interrupt()
1492 			data->bNotify2 = data->iin_buffer[1];  in usbtmc_interrupt()
1493 			atomic_set(&data->iin_data_valid, 1);  in usbtmc_interrupt()
1494 			wake_up_interruptible(&data->waitq);  in usbtmc_interrupt()
1498 		if (data->iin_buffer[0] == 0x81) {  in usbtmc_interrupt()
1502 			if (data->fasync)  in usbtmc_interrupt()
1503 				kill_fasync(&data->fasync,  in usbtmc_interrupt()
1506 			spin_lock_irqsave(&data->dev_lock, flags);  in usbtmc_interrupt()
1507 			list_for_each(elem, &data->file_list) {  in usbtmc_interrupt()
1513 				file_data->srq_byte = data->iin_buffer[1];  in usbtmc_interrupt()
1516 			spin_unlock_irqrestore(&data->dev_lock, flags);  in usbtmc_interrupt()
1519 				(unsigned int)data->iin_buffer[0],  in usbtmc_interrupt()
1520 				(unsigned int)data->iin_buffer[1]);  in usbtmc_interrupt()
1521 			wake_up_interruptible_all(&data->waitq);  in usbtmc_interrupt()
1525 			 data->iin_buffer[0]);  in usbtmc_interrupt()
1529 			data->iin_wMaxPacketSize, urb->actual_length);  in usbtmc_interrupt()
1549 static void usbtmc_free_int(struct usbtmc_device_data *data)  in usbtmc_free_int()  argument
1551 	if (!data->iin_ep_present || !data->iin_urb)  in usbtmc_free_int()
1553 	usb_kill_urb(data->iin_urb);  in usbtmc_free_int()
1554 	kfree(data->iin_buffer);  in usbtmc_free_int()
1555 	usb_free_urb(data->iin_urb);  in usbtmc_free_int()
1556 	kref_put(&data->kref, usbtmc_delete);  in usbtmc_free_int()
1562 	struct usbtmc_device_data *data;  in usbtmc_probe()  local
1569 	data = kzalloc(sizeof(*data), GFP_KERNEL);  in usbtmc_probe()
1570 	if (!data)  in usbtmc_probe()
1573 	data->intf = intf;  in usbtmc_probe()
1574 	data->id = id;  in usbtmc_probe()
1575 	data->usb_dev = usb_get_dev(interface_to_usbdev(intf));  in usbtmc_probe()
1576 	usb_set_intfdata(intf, data);  in usbtmc_probe()
1577 	kref_init(&data->kref);  in usbtmc_probe()
1578 	mutex_init(&data->io_mutex);  in usbtmc_probe()
1579 	init_waitqueue_head(&data->waitq);  in usbtmc_probe()
1580 	atomic_set(&data->iin_data_valid, 0);  in usbtmc_probe()
1581 	INIT_LIST_HEAD(&data->file_list);  in usbtmc_probe()
1582 	spin_lock_init(&data->dev_lock);  in usbtmc_probe()
1584 	data->zombie = 0;  in usbtmc_probe()
1587 	data->bTag	= 1;  in usbtmc_probe()
1588 	data->TermCharEnabled = 0;  in usbtmc_probe()
1589 	data->TermChar = '\n';  in usbtmc_probe()
1591 	data->iin_bTag = 2;  in usbtmc_probe()
1594 	iface_desc = data->intf->cur_altsetting;  in usbtmc_probe()
1595 	data->ifnum = iface_desc->desc.bInterfaceNumber;  in usbtmc_probe()
1605 	data->bulk_in = bulk_in->bEndpointAddress;  in usbtmc_probe()
1606 	dev_dbg(&intf->dev, "Found bulk in endpoint at %u\n", data->bulk_in);  in usbtmc_probe()
1608 	data->bulk_out = bulk_out->bEndpointAddress;  in usbtmc_probe()
1609 	dev_dbg(&intf->dev, "Found Bulk out endpoint at %u\n", data->bulk_out);  in usbtmc_probe()
1614 		data->iin_ep_present = 1;  in usbtmc_probe()
1615 		data->iin_ep = int_in->bEndpointAddress;  in usbtmc_probe()
1616 		data->iin_wMaxPacketSize = usb_endpoint_maxp(int_in);  in usbtmc_probe()
1617 		data->iin_interval = int_in->bInterval;  in usbtmc_probe()
1619 				data->iin_ep);  in usbtmc_probe()
1622 	retcode = get_capabilities(data);  in usbtmc_probe()
1629 	if (data->iin_ep_present) {  in usbtmc_probe()
1631 		data->iin_urb = usb_alloc_urb(0, GFP_KERNEL);  in usbtmc_probe()
1632 		if (!data->iin_urb) {  in usbtmc_probe()
1638 		kref_get(&data->kref);  in usbtmc_probe()
1641 		data->iin_buffer = kmalloc(data->iin_wMaxPacketSize,  in usbtmc_probe()
1643 		if (!data->iin_buffer) {  in usbtmc_probe()
1649 		usb_fill_int_urb(data->iin_urb, data->usb_dev,  in usbtmc_probe()
1650 				usb_rcvintpipe(data->usb_dev, data->iin_ep),  in usbtmc_probe()
1651 				data->iin_buffer, data->iin_wMaxPacketSize,  in usbtmc_probe()
1653 				data, data->iin_interval);  in usbtmc_probe()
1655 		retcode = usb_submit_urb(data->iin_urb, GFP_KERNEL);  in usbtmc_probe()
1678 	usbtmc_free_int(data);  in usbtmc_probe()
1680 	kref_put(&data->kref, usbtmc_delete);  in usbtmc_probe()
1686 	struct usbtmc_device_data *data  = usb_get_intfdata(intf);  in usbtmc_disconnect()  local
1691 	mutex_lock(&data->io_mutex);  in usbtmc_disconnect()
1692 	data->zombie = 1;  in usbtmc_disconnect()
1693 	wake_up_interruptible_all(&data->waitq);  in usbtmc_disconnect()
1694 	mutex_unlock(&data->io_mutex);  in usbtmc_disconnect()
1695 	usbtmc_free_int(data);  in usbtmc_disconnect()
1696 	kref_put(&data->kref, usbtmc_delete);  in usbtmc_disconnect()