From 9c4f9ef6f0bb630c9e210d9c8ac65b67bb805bd2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 18 Sep 2009 07:05:58 -0700
Subject: [PATCH] --- yaml --- r: 163050 b: refs/heads/master c:
 202c4675c55ddf6b443c7e057d2dff6b42ef71aa h: refs/heads/master v: v3

---
 [refs]                   | 2 +-
 trunk/drivers/char/pty.c | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index b18190a23dff..7ca39b4d7f98 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: df58bee21ed218cb7dfb561a590b1bd2a99531cf
+refs/heads/master: 202c4675c55ddf6b443c7e057d2dff6b42ef71aa
diff --git a/trunk/drivers/char/pty.c b/trunk/drivers/char/pty.c
index b33d6688e910..53761cefa915 100644
--- a/trunk/drivers/char/pty.c
+++ b/trunk/drivers/char/pty.c
@@ -120,8 +120,10 @@ static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
 		/* Stuff the data into the input queue of the other end */
 		c = tty_insert_flip_string(to, buf, c);
 		/* And shovel */
-		tty_flip_buffer_push(to);
-		tty_wakeup(tty);
+		if (c) {
+			tty_flip_buffer_push(to);
+			tty_wakeup(tty);
+		}
 	}
 	return c;
 }