linux-kernel - [ 25/75] TTY: disable debugging warning

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Date:	Mon, 18 Mar 2013 14:06:48 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, David Miller <davem@...emloft.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [ 25/75] TTY: disable debugging warning

3.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jiri Slaby <jslaby@...e.cz>

commit 34dcfb8479ab3c3669561eb9279284cb0eda2572 upstream.

We added a warning to flush_to_ldisc to report cases when it is called
with a NULL tty. It was for debugging purposes and it lead to a
patchset from Peter Hurley. The patchset however did not make it to
3.9, so disable the warning now to not disturb people.

We can re-add it when the series is in and we are hunting for another
bugs.

Reported-by: David Miller <davem@...emloft.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/tty/tty_buffer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -473,7 +473,7 @@ static void flush_to_ldisc(struct work_s
 	struct tty_ldisc *disc;
 
 	tty = port->itty;
-	if (WARN_RATELIMIT(tty == NULL, "tty is NULL\n"))
+	if (tty == NULL)
 		return;
 
 	disc = tty_ldisc_ref(tty);


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