256 	if (!tty || !tty->driver)  in tty_driver_name()
258 	return tty->driver->name;  in tty_driver_name()
291 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in check_tty_count()
292 	    tty->driver->subtype == PTY_TYPE_SLAVE &&  in check_tty_count()
1112 static void pty_line_name(struct tty_driver *driver, int index, char *p)  in pty_line_name()  argument
1114 	int i = index + driver->name_base;  in pty_line_name()
1117 		driver->subtype == PTY_TYPE_SLAVE ? "tty" : driver->name,  in pty_line_name()
1132 static ssize_t tty_line_name(struct tty_driver *driver, int index, char *p)  in tty_line_name()  argument
1134 	if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE)  in tty_line_name()
1135 		return sprintf(p, "%s", driver->name);  in tty_line_name()
1137 		return sprintf(p, "%s%d", driver->name,  in tty_line_name()
1138 			       index + driver->name_base);  in tty_line_name()
1151 static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,  in tty_driver_lookup_tty()  argument
1156 	if (driver->ops->lookup)  in tty_driver_lookup_tty()
1160 			tty = driver->ops->lookup(driver, file, idx);  in tty_driver_lookup_tty()
1162 		tty = driver->ttys[idx];  in tty_driver_lookup_tty()
1182 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_init_termios()
1183 		tty->termios = tty->driver->init_termios;  in tty_init_termios()
1186 		tp = tty->driver->termios[idx];  in tty_init_termios()
1189 			tty->termios.c_line  = tty->driver->init_termios.c_line;  in tty_init_termios()
1191 			tty->termios = tty->driver->init_termios;  in tty_init_termios()
1199 int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)  in tty_standard_install()  argument
1202 	tty_driver_kref_get(driver);  in tty_standard_install()
1204 	driver->ttys[tty->index] = tty;  in tty_standard_install()
1221 static int tty_driver_install_tty(struct tty_driver *driver,  in tty_driver_install_tty()  argument
1224 	return driver->ops->install ? driver->ops->install(driver, tty) :  in tty_driver_install_tty()
1225 		tty_standard_install(driver, tty);  in tty_driver_install_tty()
1238 static void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty)  in tty_driver_remove_tty()  argument
1240 	if (driver->ops->remove)  in tty_driver_remove_tty()
1241 		driver->ops->remove(driver, tty);  in tty_driver_remove_tty()
1243 		driver->ttys[tty->index] = NULL;  in tty_driver_remove_tty()
1257 	struct tty_driver *driver = tty->driver;  in tty_reopen()  local
1260 	if (driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_reopen()
1261 	    driver->subtype == PTY_TYPE_MASTER)  in tty_reopen()
1306 struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)  in tty_init_dev()  argument
1319 	if (!try_module_get(driver->owner))  in tty_init_dev()
1322 	tty = alloc_tty_struct(driver, idx);  in tty_init_dev()
1329 	retval = tty_driver_install_tty(driver, tty);  in tty_init_dev()
1334 		tty->port = driver->ports[idx];  in tty_init_dev()
1338 			__func__, tty->driver->name);  in tty_init_dev()
1361 	module_put(driver->owner);  in tty_init_dev()
1381 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_free_termios()
1385 	tp = tty->driver->termios[idx];  in tty_free_termios()
1390 		tty->driver->termios[idx] = tp;  in tty_free_termios()
1430 	struct tty_driver *driver = tty->driver;  in release_one_tty()  local
1431 	struct module *owner = driver->owner;  in release_one_tty()
1437 	tty_driver_kref_put(driver);  in release_one_tty()
1494 	tty_driver_remove_tty(tty->driver, tty);  in release_tty()
1518 	if (idx < 0 || idx >= tty->driver->num) {  in tty_release_checks()
1524 	if (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)  in tty_release_checks()
1527 	if (tty != tty->driver->ttys[idx]) {  in tty_release_checks()
1529 			  idx, tty->driver->ttys[idx]);  in tty_release_checks()
1532 	if (tty->driver->other) {  in tty_release_checks()
1535 		if (o_tty != tty->driver->other->ttys[idx]) {  in tty_release_checks()
1537 				  idx, tty->driver->other->ttys[idx]);  in tty_release_checks()
1649 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_release()
1650 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_release()
1822 	struct tty_driver *driver;  in tty_lookup_driver()  local
1828 		driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1836 			driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1837 			if (driver && filp) {  in tty_lookup_driver()
1846 		driver = get_tty_driver(device, index);  in tty_lookup_driver()
1847 		if (!driver)  in tty_lookup_driver()
1851 	return driver;  in tty_lookup_driver()
1872 	struct tty_driver *driver = NULL;  in tty_kopen()  local
1876 	driver = tty_lookup_driver(device, NULL, &index);  in tty_kopen()
1877 	if (IS_ERR(driver)) {  in tty_kopen()
1879 		return ERR_CAST(driver);  in tty_kopen()
1883 	tty = tty_driver_lookup_tty(driver, NULL, index);  in tty_kopen()
1892 		tty = tty_init_dev(driver, index);  in tty_kopen()
1899 	tty_driver_kref_put(driver);  in tty_kopen()
1924 	struct tty_driver *driver = NULL;  in tty_open_by_driver()  local
1929 	driver = tty_lookup_driver(device, filp, &index);  in tty_open_by_driver()
1930 	if (IS_ERR(driver)) {  in tty_open_by_driver()
1932 		return ERR_CAST(driver);  in tty_open_by_driver()
1936 	tty = tty_driver_lookup_tty(driver, filp, index);  in tty_open_by_driver()
1964 		tty = tty_init_dev(driver, index);  in tty_open_by_driver()
1968 	tty_driver_kref_put(driver);  in tty_open_by_driver()
2058 		 (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_open()
2059 		  tty->driver->subtype == PTY_TYPE_MASTER);  in tty_open()
2390 	if (tty->driver->flags & TTY_DRIVER_HARDWARE_BREAK)  in send_break()
2515 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_pair_get_tty()
2516 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_pair_get_tty()
2814 struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx)  in alloc_tty_struct()  argument
2845 	tty->driver = driver;  in alloc_tty_struct()
2846 	tty->ops = driver->ops;  in alloc_tty_struct()
2848 	tty_line_name(driver, idx, tty->name);  in alloc_tty_struct()
2876 static int tty_cdev_add(struct tty_driver *driver, dev_t dev,  in tty_cdev_add()  argument
2882 	driver->cdevs[index] = cdev_alloc();  in tty_cdev_add()
2883 	if (!driver->cdevs[index])  in tty_cdev_add()
2885 	driver->cdevs[index]->ops = &tty_fops;  in tty_cdev_add()
2886 	driver->cdevs[index]->owner = driver->owner;  in tty_cdev_add()
2887 	err = cdev_add(driver->cdevs[index], dev, count);  in tty_cdev_add()
2889 		kobject_put(&driver->cdevs[index]->kobj);  in tty_cdev_add()
2912 struct device *tty_register_device(struct tty_driver *driver, unsigned index,  in tty_register_device()  argument
2915 	return tty_register_device_attr(driver, index, device, NULL, NULL);  in tty_register_device()
2945 struct device *tty_register_device_attr(struct tty_driver *driver,  in tty_register_device_attr()  argument
2951 	dev_t devt = MKDEV(driver->major, driver->minor_start) + index;  in tty_register_device_attr()
2956 	if (index >= driver->num) {  in tty_register_device_attr()
2958 		       driver->name, index);  in tty_register_device_attr()
2962 	if (driver->type == TTY_DRIVER_TYPE_PTY)  in tty_register_device_attr()
2963 		pty_line_name(driver, index, name);  in tty_register_device_attr()
2965 		tty_line_name(driver, index, name);  in tty_register_device_attr()
2985 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_register_device_attr()
2990 		tp = driver->termios[index];  in tty_register_device_attr()
2992 			driver->termios[index] = NULL;  in tty_register_device_attr()
2996 		retval = tty_cdev_add(driver, devt, index, 1);  in tty_register_device_attr()
3026 void tty_unregister_device(struct tty_driver *driver, unsigned index)  in tty_unregister_device()  argument
3029 		MKDEV(driver->major, driver->minor_start) + index);  in tty_unregister_device()
3030 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_unregister_device()
3031 		cdev_del(driver->cdevs[index]);  in tty_unregister_device()
3032 		driver->cdevs[index] = NULL;  in tty_unregister_device()
3049 	struct tty_driver *driver;  in __tty_alloc_driver()  local
3056 	driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL);  in __tty_alloc_driver()
3057 	if (!driver)  in __tty_alloc_driver()
3060 	kref_init(&driver->kref);  in __tty_alloc_driver()
3061 	driver->magic = TTY_DRIVER_MAGIC;  in __tty_alloc_driver()
3062 	driver->num = lines;  in __tty_alloc_driver()
3063 	driver->owner = owner;  in __tty_alloc_driver()
3064 	driver->flags = flags;  in __tty_alloc_driver()
3067 		driver->ttys = kcalloc(lines, sizeof(*driver->ttys),  in __tty_alloc_driver()
3069 		driver->termios = kcalloc(lines, sizeof(*driver->termios),  in __tty_alloc_driver()
3071 		if (!driver->ttys || !driver->termios) {  in __tty_alloc_driver()
3078 		driver->ports = kcalloc(lines, sizeof(*driver->ports),  in __tty_alloc_driver()
3080 		if (!driver->ports) {  in __tty_alloc_driver()
3087 	driver->cdevs = kcalloc(cdevs, sizeof(*driver->cdevs), GFP_KERNEL);  in __tty_alloc_driver()
3088 	if (!driver->cdevs) {  in __tty_alloc_driver()
3093 	return driver;  in __tty_alloc_driver()
3095 	kfree(driver->ports);  in __tty_alloc_driver()
3096 	kfree(driver->ttys);  in __tty_alloc_driver()
3097 	kfree(driver->termios);  in __tty_alloc_driver()
3098 	kfree(driver->cdevs);  in __tty_alloc_driver()
3099 	kfree(driver);  in __tty_alloc_driver()
3106 	struct tty_driver *driver = container_of(kref, struct tty_driver, kref);  in destruct_tty_driver()  local
3110 	if (driver->flags & TTY_DRIVER_INSTALLED) {  in destruct_tty_driver()
3111 		for (i = 0; i < driver->num; i++) {  in destruct_tty_driver()
3112 			tp = driver->termios[i];  in destruct_tty_driver()
3114 				driver->termios[i] = NULL;  in destruct_tty_driver()
3117 			if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))  in destruct_tty_driver()
3118 				tty_unregister_device(driver, i);  in destruct_tty_driver()
3120 		proc_tty_unregister_driver(driver);  in destruct_tty_driver()
3121 		if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)  in destruct_tty_driver()
3122 			cdev_del(driver->cdevs[0]);  in destruct_tty_driver()
3124 	kfree(driver->cdevs);  in destruct_tty_driver()
3125 	kfree(driver->ports);  in destruct_tty_driver()
3126 	kfree(driver->termios);  in destruct_tty_driver()
3127 	kfree(driver->ttys);  in destruct_tty_driver()
3128 	kfree(driver);  in destruct_tty_driver()
3131 void tty_driver_kref_put(struct tty_driver *driver)  in tty_driver_kref_put()  argument
3133 	kref_put(&driver->kref, destruct_tty_driver);  in tty_driver_kref_put()
3137 void tty_set_operations(struct tty_driver *driver,  in tty_set_operations()  argument
3140 	driver->ops = op;  in tty_set_operations()
3153 int tty_register_driver(struct tty_driver *driver)  in tty_register_driver()  argument
3160 	if (!driver->major) {  in tty_register_driver()
3161 		error = alloc_chrdev_region(&dev, driver->minor_start,  in tty_register_driver()
3162 						driver->num, driver->name);  in tty_register_driver()
3164 			driver->major = MAJOR(dev);  in tty_register_driver()
3165 			driver->minor_start = MINOR(dev);  in tty_register_driver()
3168 		dev = MKDEV(driver->major, driver->minor_start);  in tty_register_driver()
3169 		error = register_chrdev_region(dev, driver->num, driver->name);  in tty_register_driver()
3174 	if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC) {  in tty_register_driver()
3175 		error = tty_cdev_add(driver, dev, 0, driver->num);  in tty_register_driver()
3181 	list_add(&driver->tty_drivers, &tty_drivers);  in tty_register_driver()
3184 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV)) {  in tty_register_driver()
3185 		for (i = 0; i < driver->num; i++) {  in tty_register_driver()
3186 			d = tty_register_device(driver, i, NULL);  in tty_register_driver()
3193 	proc_tty_register_driver(driver);  in tty_register_driver()
3194 	driver->flags |= TTY_DRIVER_INSTALLED;  in tty_register_driver()
3199 		tty_unregister_device(driver, i);  in tty_register_driver()
3202 	list_del(&driver->tty_drivers);  in tty_register_driver()
3206 	unregister_chrdev_region(dev, driver->num);  in tty_register_driver()
3215 int tty_unregister_driver(struct tty_driver *driver)  in tty_unregister_driver()  argument
3219 	if (driver->refcount)  in tty_unregister_driver()
3222 	unregister_chrdev_region(MKDEV(driver->major, driver->minor_start),  in tty_unregister_driver()
3223 				driver->num);  in tty_unregister_driver()
3225 	list_del(&driver->tty_drivers);  in tty_unregister_driver()
3234 	return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;  in tty_devnum()