diff options
Diffstat (limited to 'drivers/tty/tty_mutex.c')
| -rw-r--r-- | drivers/tty/tty_mutex.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c index 0efcf713b756..d2f3c4cd697f 100644 --- a/drivers/tty/tty_mutex.c +++ b/drivers/tty/tty_mutex.c @@ -12,23 +12,25 @@ void __lockfunc tty_lock(struct tty_struct *tty) { - if (tty->magic != TTY_MAGIC) { - pr_err("L Bad %p\n", tty); - WARN_ON(1); + if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty)) return; - } tty_kref_get(tty); mutex_lock(&tty->legacy_mutex); } EXPORT_SYMBOL(tty_lock); +int tty_lock_interruptible(struct tty_struct *tty) +{ + if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty)) + return -EIO; + tty_kref_get(tty); + return mutex_lock_interruptible(&tty->legacy_mutex); +} + void __lockfunc tty_unlock(struct tty_struct *tty) { - if (tty->magic != TTY_MAGIC) { - pr_err("U Bad %p\n", tty); - WARN_ON(1); + if (WARN(tty->magic != TTY_MAGIC, "U Bad %p\n", tty)) return; - } mutex_unlock(&tty->legacy_mutex); tty_kref_put(tty); } |
