TTY: introduce deinit helpers for proper ldisc shutdown

[pandora-kernel.git] / drivers / tty / tty_ldisc.c

diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index e19e136..5d01d32 100644 (file)
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -956,6 +956,19 @@ void tty_ldisc_init(struct tty_struct *tty)
        tty_ldisc_assign(tty, ld);
 }
 
        tty_ldisc_assign(tty, ld);
 }
 

+/**
+ *     tty_ldisc_init          -       ldisc cleanup for new tty
+ *     @tty: tty that was allocated recently
+ *
+ *     The tty structure must not becompletely set up (tty_ldisc_setup) when
+ *      this call is made.
+ */
+void tty_ldisc_deinit(struct tty_struct *tty)
+{
+       put_ldisc(tty->ldisc);
+       tty_ldisc_assign(tty, NULL);
+}
+

 void tty_ldisc_begin(void)
 {
        /* Setup the default TTY line discipline. */
 void tty_ldisc_begin(void)
 {
        /* Setup the default TTY line discipline. */