diff options
Diffstat (limited to 'drivers/char/vt.c')
| -rw-r--r-- | drivers/char/vt.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c index ec94521c311..37a45db5bae 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -2758,6 +2758,12 @@ static int con_open(struct tty_struct *tty, struct file *filp) ret = vc_allocate(currcons); if (ret == 0) { struct vc_data *vc = vc_cons[currcons].d; + + /* Still being freed */ + if (vc->vc_tty) { + release_console_sem(); + return -ERESTARTSYS; + } tty->driver_data = vc; vc->vc_tty = tty; @@ -2787,25 +2793,18 @@ static int con_open(struct tty_struct *tty, struct file *filp) */ static void con_close(struct tty_struct *tty, struct file *filp) { - mutex_lock(&tty_mutex); - acquire_console_sem(); - if (tty && tty->count == 1) { - struct vc_data *vc = tty->driver_data; + /* Nothing to do - we defer to shutdown */ +} - if (vc) - vc->vc_tty = NULL; - tty->driver_data = NULL; - vcs_remove_sysfs(tty); - release_console_sem(); - mutex_unlock(&tty_mutex); - /* - * tty_mutex is released, but we still hold BKL, so there is - * still exclusion against init_dev() - */ - return; - } +static void con_shutdown(struct tty_struct *tty) +{ + struct vc_data *vc = tty->driver_data; + BUG_ON(vc == NULL); + acquire_console_sem(); + vc->vc_tty = NULL; + vcs_remove_sysfs(tty); release_console_sem(); - mutex_unlock(&tty_mutex); + tty_shutdown(tty); } static int default_italic_color = 2; // green (ASCII) @@ -2930,6 +2929,7 @@ static const struct tty_operations con_ops = { .throttle = con_throttle, .unthrottle = con_unthrottle, .resize = vt_resize, + .shutdown = con_shutdown }; int __init vty_init(void) |