diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/tty_io.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 0140c8669ada..8d26ed79bb4c 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -2260,10 +2260,11 @@ out: static int tty_fasync(int fd, struct file *filp, int on) { struct tty_struct *tty = file_tty(filp); - int retval; + int retval = -ENOTTY; tty_lock(tty); - retval = __tty_fasync(fd, filp, on); + if (!tty_hung_up_p(filp)) + retval = __tty_fasync(fd, filp, on); tty_unlock(tty); return retval; |