Patch Upstream: TTY: disable debugging warning

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commit: 34dcfb8479ab3c3669561eb9279284cb0eda2572
From: Jiri Slaby <jslaby@xxxxxxx>
Date: Wed, 27 Feb 2013 22:30:24 +0100
Subject: TTY: disable debugging warning

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@xxxxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>   # 3.8
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/tty/tty_buffer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index bb11993..578aa75 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -425,7 +425,7 @@ static void flush_to_ldisc(struct work_struct *work)
 	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);
-- 
1.7.10.4
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