diff options
Diffstat (limited to 'drivers/tty/tty_ioctl.c')
| -rw-r--r-- | drivers/tty/tty_ioctl.c | 50 |
1 files changed, 23 insertions, 27 deletions
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index 85de90eebc7b..90c70d8d14e3 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -122,21 +122,19 @@ EXPORT_SYMBOL(tty_unthrottle); */ bool tty_throttle_safe(struct tty_struct *tty) { - bool ret = true; - - mutex_lock(&tty->throttle_mutex); - if (!tty_throttled(tty)) { - if (tty->flow_change != TTY_THROTTLE_SAFE) - ret = false; - else { - set_bit(TTY_THROTTLED, &tty->flags); - if (tty->ops->throttle) - tty->ops->throttle(tty); - } - } - mutex_unlock(&tty->throttle_mutex); + guard(mutex)(&tty->throttle_mutex); - return ret; + if (tty_throttled(tty)) + return true; + + if (tty->flow_change != TTY_THROTTLE_SAFE) + return false; + + set_bit(TTY_THROTTLED, &tty->flags); + if (tty->ops->throttle) + tty->ops->throttle(tty); + + return true; } /** @@ -152,21 +150,19 @@ bool tty_throttle_safe(struct tty_struct *tty) */ bool tty_unthrottle_safe(struct tty_struct *tty) { - bool ret = true; + guard(mutex)(&tty->throttle_mutex); - mutex_lock(&tty->throttle_mutex); - if (tty_throttled(tty)) { - if (tty->flow_change != TTY_UNTHROTTLE_SAFE) - ret = false; - else { - clear_bit(TTY_THROTTLED, &tty->flags); - if (tty->ops->unthrottle) - tty->ops->unthrottle(tty); - } - } - mutex_unlock(&tty->throttle_mutex); + if (!tty_throttled(tty)) + return true; - return ret; + if (tty->flow_change != TTY_UNTHROTTLE_SAFE) + return false; + + clear_bit(TTY_THROTTLED, &tty->flags); + if (tty->ops->unthrottle) + tty->ops->unthrottle(tty); + + return true; } /** |