diff options
Diffstat (limited to 'drivers/char/tty_io.c')
| -rw-r--r-- | drivers/char/tty_io.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 613c852ee0f..dc184d4b563 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -183,6 +183,8 @@ struct tty_struct *alloc_tty_struct(void) void free_tty_struct(struct tty_struct *tty) { + if (tty->dev) + put_device(tty->dev); kfree(tty->write_buf); tty_buffer_free_all(tty); kfree(tty); @@ -2783,6 +2785,20 @@ void do_SAK(struct tty_struct *tty) EXPORT_SYMBOL(do_SAK); +static int dev_match_devt(struct device *dev, void *data) +{ + dev_t *devt = data; + return dev->devt == *devt; +} + +/* Must put_device() after it's unused! */ +static struct device *tty_get_device(struct tty_struct *tty) +{ + dev_t devt = tty_devnum(tty); + return class_find_device(tty_class, NULL, &devt, dev_match_devt); +} + + /** * initialize_tty_struct * @tty: tty to initialize @@ -2823,6 +2839,7 @@ void initialize_tty_struct(struct tty_struct *tty, tty->ops = driver->ops; tty->index = idx; tty_line_name(driver, idx, tty->name); + tty->dev = tty_get_device(tty); } /** |