tty: Fix tty_send_xchar() lock order inversion

[linux-2.6-block.git] / drivers / tty / tty_ioctl.c

diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 9c5aebfe7053cbcae1fd65a95f3312509525e8e6..1445dd39aa6227ab641130ef7344eaba9f113b86 100644 (file)
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -1147,16 +1147,12 @@ int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
                        spin_unlock_irq(&tty->flow_lock);
                        break;
                case TCIOFF:
-                       down_read(&tty->termios_rwsem);
                        if (STOP_CHAR(tty) != __DISABLED_CHAR)
                                retval = tty_send_xchar(tty, STOP_CHAR(tty));
-                       up_read(&tty->termios_rwsem);
                        break;
                case TCION:
-                       down_read(&tty->termios_rwsem);
                        if (START_CHAR(tty) != __DISABLED_CHAR)
                                retval = tty_send_xchar(tty, START_CHAR(tty));
-                       up_read(&tty->termios_rwsem);
                        break;
                default:
                        return -EINVAL;