From: Alan Cox <alan@linux.intel.com>
Date: Tue, 16 Jun 2009 16:00:53 +0000 (+0100)
Subject: ldisc: debug aids
X-Git-Tag: firefly_0821_release~13899^2~6
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=677ca3060c474d7d89941948e32493d9c18c52d2;p=firefly-linux-kernel-4.4.55.git

ldisc: debug aids

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c
index 874c2486c034..a19e935847b0 100644
--- a/drivers/char/tty_ldisc.c
+++ b/drivers/char/tty_ldisc.c
@@ -207,6 +207,7 @@ static void tty_ldisc_put(struct tty_ldisc *ld)
 	ldo->refcount--;
 	module_put(ldo->owner);
 	spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+	WARN_ON(ld->refcount);
 	kfree(ld);
 }