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-rw-r--r--drivers/char/pty.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index b33d6688e91..53761cefa91 100644
--- a/drivers/char/pty.c
+++ b/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;
}