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path: root/drivers/tty/tty_ldisc.c
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Diffstat (limited to 'drivers/tty/tty_ldisc.c')
-rw-r--r--drivers/tty/tty_ldisc.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index c5782294e53..d794087c327 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -64,7 +64,9 @@ static void put_ldisc(struct tty_ldisc *ld)
return;
}
raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
- wake_up(&ld->wq_idle);
+
+ if (waitqueue_active(&ld->wq_idle))
+ wake_up(&ld->wq_idle);
}
/**
@@ -934,17 +936,17 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty)
* race with the set_ldisc code path.
*/
- tty_lock_pair(tty, o_tty);
tty_ldisc_halt(tty);
- tty_ldisc_flush_works(tty);
- if (o_tty) {
+ if (o_tty)
tty_ldisc_halt(o_tty);
+
+ tty_ldisc_flush_works(tty);
+ if (o_tty)
tty_ldisc_flush_works(o_tty);
- }
+ tty_lock_pair(tty, o_tty);
/* This will need doing differently if we need to lock */
tty_ldisc_kill(tty);
-
if (o_tty)
tty_ldisc_kill(o_tty);