257 	if (!tty || !tty->driver)  in tty_driver_name()
259 	return tty->driver->name;  in tty_driver_name()
292 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in check_tty_count()
293 	    tty->driver->subtype == PTY_TYPE_SLAVE &&  in check_tty_count()
1115 static void pty_line_name(struct tty_driver *driver, int index, char *p)  in pty_line_name()  argument
1117 	int i = index + driver->name_base;  in pty_line_name()
1120 		driver->subtype == PTY_TYPE_SLAVE ? "tty" : driver->name,  in pty_line_name()
1135 static ssize_t tty_line_name(struct tty_driver *driver, int index, char *p)  in tty_line_name()  argument
1137 	if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE)  in tty_line_name()
1138 		return sprintf(p, "%s", driver->name);  in tty_line_name()
1140 		return sprintf(p, "%s%d", driver->name,  in tty_line_name()
1141 			       index + driver->name_base);  in tty_line_name()
1154 static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,  in tty_driver_lookup_tty()  argument
1159 	if (driver->ops->lookup)  in tty_driver_lookup_tty()
1163 			tty = driver->ops->lookup(driver, file, idx);  in tty_driver_lookup_tty()
1165 		tty = driver->ttys[idx];  in tty_driver_lookup_tty()
1185 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_init_termios()
1186 		tty->termios = tty->driver->init_termios;  in tty_init_termios()
1189 		tp = tty->driver->termios[idx];  in tty_init_termios()
1192 			tty->termios.c_line  = tty->driver->init_termios.c_line;  in tty_init_termios()
1194 			tty->termios = tty->driver->init_termios;  in tty_init_termios()
1202 int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)  in tty_standard_install()  argument
1205 	tty_driver_kref_get(driver);  in tty_standard_install()
1207 	driver->ttys[tty->index] = tty;  in tty_standard_install()
1224 static int tty_driver_install_tty(struct tty_driver *driver,  in tty_driver_install_tty()  argument
1227 	return driver->ops->install ? driver->ops->install(driver, tty) :  in tty_driver_install_tty()
1228 		tty_standard_install(driver, tty);  in tty_driver_install_tty()
1241 static void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty)  in tty_driver_remove_tty()  argument
1243 	if (driver->ops->remove)  in tty_driver_remove_tty()
1244 		driver->ops->remove(driver, tty);  in tty_driver_remove_tty()
1246 		driver->ttys[tty->index] = NULL;  in tty_driver_remove_tty()
1260 	struct tty_driver *driver = tty->driver;  in tty_reopen()  local
1264 	if (driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_reopen()
1265 	    driver->subtype == PTY_TYPE_MASTER)  in tty_reopen()
1317 struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)  in tty_init_dev()  argument
1330 	if (!try_module_get(driver->owner))  in tty_init_dev()
1333 	tty = alloc_tty_struct(driver, idx);  in tty_init_dev()
1340 	retval = tty_driver_install_tty(driver, tty);  in tty_init_dev()
1345 		tty->port = driver->ports[idx];  in tty_init_dev()
1349 			__func__, tty->driver->name);  in tty_init_dev()
1372 	module_put(driver->owner);  in tty_init_dev()
1398 	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)  in tty_save_termios()
1402 	tp = tty->driver->termios[idx];  in tty_save_termios()
1407 		tty->driver->termios[idx] = tp;  in tty_save_termios()
1448 	struct tty_driver *driver = tty->driver;  in release_one_tty()  local
1449 	struct module *owner = driver->owner;  in release_one_tty()
1455 	tty_driver_kref_put(driver);  in release_one_tty()
1512 	tty_driver_remove_tty(tty->driver, tty);  in release_tty()
1536 	if (idx < 0 || idx >= tty->driver->num) {  in tty_release_checks()
1542 	if (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)  in tty_release_checks()
1545 	if (tty != tty->driver->ttys[idx]) {  in tty_release_checks()
1547 			  idx, tty->driver->ttys[idx]);  in tty_release_checks()
1550 	if (tty->driver->other) {  in tty_release_checks()
1553 		if (o_tty != tty->driver->other->ttys[idx]) {  in tty_release_checks()
1555 				  idx, tty->driver->other->ttys[idx]);  in tty_release_checks()
1667 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_release()
1668 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_release()
1840 	struct tty_driver *driver = NULL;  in tty_lookup_driver()  local
1846 		driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1854 			driver = tty_driver_kref_get(console_driver);  in tty_lookup_driver()
1855 			if (driver && filp) {  in tty_lookup_driver()
1861 		if (driver)  in tty_lookup_driver()
1862 			tty_driver_kref_put(driver);  in tty_lookup_driver()
1866 		driver = get_tty_driver(device, index);  in tty_lookup_driver()
1867 		if (!driver)  in tty_lookup_driver()
1871 	return driver;  in tty_lookup_driver()
1892 	struct tty_driver *driver = NULL;  in tty_kopen()  local
1896 	driver = tty_lookup_driver(device, NULL, &index);  in tty_kopen()
1897 	if (IS_ERR(driver)) {  in tty_kopen()
1899 		return ERR_CAST(driver);  in tty_kopen()
1903 	tty = tty_driver_lookup_tty(driver, NULL, index);  in tty_kopen()
1912 		tty = tty_init_dev(driver, index);  in tty_kopen()
1919 	tty_driver_kref_put(driver);  in tty_kopen()
1944 	struct tty_driver *driver = NULL;  in tty_open_by_driver()  local
1949 	driver = tty_lookup_driver(device, filp, &index);  in tty_open_by_driver()
1950 	if (IS_ERR(driver)) {  in tty_open_by_driver()
1952 		return ERR_CAST(driver);  in tty_open_by_driver()
1956 	tty = tty_driver_lookup_tty(driver, filp, index);  in tty_open_by_driver()
1984 		tty = tty_init_dev(driver, index);  in tty_open_by_driver()
1988 	tty_driver_kref_put(driver);  in tty_open_by_driver()
2078 		 (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_open()
2079 		  tty->driver->subtype == PTY_TYPE_MASTER);  in tty_open()
2383 	if (tty->driver->flags & TTY_DRIVER_HARDWARE_BREAK)  in send_break()
2526 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&  in tty_pair_get_tty()
2527 	    tty->driver->subtype == PTY_TYPE_MASTER)  in tty_pair_get_tty()
2971 struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx)  in alloc_tty_struct()  argument
3002 	tty->driver = driver;  in alloc_tty_struct()
3003 	tty->ops = driver->ops;  in alloc_tty_struct()
3005 	tty_line_name(driver, idx, tty->name);  in alloc_tty_struct()
3033 static int tty_cdev_add(struct tty_driver *driver, dev_t dev,  in tty_cdev_add()  argument
3039 	driver->cdevs[index] = cdev_alloc();  in tty_cdev_add()
3040 	if (!driver->cdevs[index])  in tty_cdev_add()
3042 	driver->cdevs[index]->ops = &tty_fops;  in tty_cdev_add()
3043 	driver->cdevs[index]->owner = driver->owner;  in tty_cdev_add()
3044 	err = cdev_add(driver->cdevs[index], dev, count);  in tty_cdev_add()
3046 		kobject_put(&driver->cdevs[index]->kobj);  in tty_cdev_add()
3069 struct device *tty_register_device(struct tty_driver *driver, unsigned index,  in tty_register_device()  argument
3072 	return tty_register_device_attr(driver, index, device, NULL, NULL);  in tty_register_device()
3102 struct device *tty_register_device_attr(struct tty_driver *driver,  in tty_register_device_attr()  argument
3108 	dev_t devt = MKDEV(driver->major, driver->minor_start) + index;  in tty_register_device_attr()
3113 	if (index >= driver->num) {  in tty_register_device_attr()
3115 		       driver->name, index);  in tty_register_device_attr()
3119 	if (driver->type == TTY_DRIVER_TYPE_PTY)  in tty_register_device_attr()
3120 		pty_line_name(driver, index, name);  in tty_register_device_attr()
3122 		tty_line_name(driver, index, name);  in tty_register_device_attr()
3142 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_register_device_attr()
3147 		tp = driver->termios[index];  in tty_register_device_attr()
3149 			driver->termios[index] = NULL;  in tty_register_device_attr()
3153 		retval = tty_cdev_add(driver, devt, index, 1);  in tty_register_device_attr()
3183 void tty_unregister_device(struct tty_driver *driver, unsigned index)  in tty_unregister_device()  argument
3186 		MKDEV(driver->major, driver->minor_start) + index);  in tty_unregister_device()
3187 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {  in tty_unregister_device()
3188 		cdev_del(driver->cdevs[index]);  in tty_unregister_device()
3189 		driver->cdevs[index] = NULL;  in tty_unregister_device()
3206 	struct tty_driver *driver;  in __tty_alloc_driver()  local
3213 	driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL);  in __tty_alloc_driver()
3214 	if (!driver)  in __tty_alloc_driver()
3217 	kref_init(&driver->kref);  in __tty_alloc_driver()
3218 	driver->magic = TTY_DRIVER_MAGIC;  in __tty_alloc_driver()
3219 	driver->num = lines;  in __tty_alloc_driver()
3220 	driver->owner = owner;  in __tty_alloc_driver()
3221 	driver->flags = flags;  in __tty_alloc_driver()
3224 		driver->ttys = kcalloc(lines, sizeof(*driver->ttys),  in __tty_alloc_driver()
3226 		driver->termios = kcalloc(lines, sizeof(*driver->termios),  in __tty_alloc_driver()
3228 		if (!driver->ttys || !driver->termios) {  in __tty_alloc_driver()
3235 		driver->ports = kcalloc(lines, sizeof(*driver->ports),  in __tty_alloc_driver()
3237 		if (!driver->ports) {  in __tty_alloc_driver()
3244 	driver->cdevs = kcalloc(cdevs, sizeof(*driver->cdevs), GFP_KERNEL);  in __tty_alloc_driver()
3245 	if (!driver->cdevs) {  in __tty_alloc_driver()
3250 	return driver;  in __tty_alloc_driver()
3252 	kfree(driver->ports);  in __tty_alloc_driver()
3253 	kfree(driver->ttys);  in __tty_alloc_driver()
3254 	kfree(driver->termios);  in __tty_alloc_driver()
3255 	kfree(driver->cdevs);  in __tty_alloc_driver()
3256 	kfree(driver);  in __tty_alloc_driver()
3263 	struct tty_driver *driver = container_of(kref, struct tty_driver, kref);  in destruct_tty_driver()  local
3267 	if (driver->flags & TTY_DRIVER_INSTALLED) {  in destruct_tty_driver()
3268 		for (i = 0; i < driver->num; i++) {  in destruct_tty_driver()
3269 			tp = driver->termios[i];  in destruct_tty_driver()
3271 				driver->termios[i] = NULL;  in destruct_tty_driver()
3274 			if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))  in destruct_tty_driver()
3275 				tty_unregister_device(driver, i);  in destruct_tty_driver()
3277 		proc_tty_unregister_driver(driver);  in destruct_tty_driver()
3278 		if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)  in destruct_tty_driver()
3279 			cdev_del(driver->cdevs[0]);  in destruct_tty_driver()
3281 	kfree(driver->cdevs);  in destruct_tty_driver()
3282 	kfree(driver->ports);  in destruct_tty_driver()
3283 	kfree(driver->termios);  in destruct_tty_driver()
3284 	kfree(driver->ttys);  in destruct_tty_driver()
3285 	kfree(driver);  in destruct_tty_driver()
3288 void tty_driver_kref_put(struct tty_driver *driver)  in tty_driver_kref_put()  argument
3290 	kref_put(&driver->kref, destruct_tty_driver);  in tty_driver_kref_put()
3294 void tty_set_operations(struct tty_driver *driver,  in tty_set_operations()  argument
3297 	driver->ops = op;  in tty_set_operations()
3310 int tty_register_driver(struct tty_driver *driver)  in tty_register_driver()  argument
3317 	if (!driver->major) {  in tty_register_driver()
3318 		error = alloc_chrdev_region(&dev, driver->minor_start,  in tty_register_driver()
3319 						driver->num, driver->name);  in tty_register_driver()
3321 			driver->major = MAJOR(dev);  in tty_register_driver()
3322 			driver->minor_start = MINOR(dev);  in tty_register_driver()
3325 		dev = MKDEV(driver->major, driver->minor_start);  in tty_register_driver()
3326 		error = register_chrdev_region(dev, driver->num, driver->name);  in tty_register_driver()
3331 	if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC) {  in tty_register_driver()
3332 		error = tty_cdev_add(driver, dev, 0, driver->num);  in tty_register_driver()
3338 	list_add(&driver->tty_drivers, &tty_drivers);  in tty_register_driver()
3341 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV)) {  in tty_register_driver()
3342 		for (i = 0; i < driver->num; i++) {  in tty_register_driver()
3343 			d = tty_register_device(driver, i, NULL);  in tty_register_driver()
3350 	proc_tty_register_driver(driver);  in tty_register_driver()
3351 	driver->flags |= TTY_DRIVER_INSTALLED;  in tty_register_driver()
3356 		tty_unregister_device(driver, i);  in tty_register_driver()
3359 	list_del(&driver->tty_drivers);  in tty_register_driver()
3363 	unregister_chrdev_region(dev, driver->num);  in tty_register_driver()
3372 int tty_unregister_driver(struct tty_driver *driver)  in tty_unregister_driver()  argument
3376 	if (driver->refcount)  in tty_unregister_driver()
3379 	unregister_chrdev_region(MKDEV(driver->major, driver->minor_start),  in tty_unregister_driver()
3380 				driver->num);  in tty_unregister_driver()
3382 	list_del(&driver->tty_drivers);  in tty_unregister_driver()
3391 	return MKDEV(tty->driver->major, tty->driver->minor_start) + tty->index;  in tty_devnum()