From 80cace72566633bb99da1f022f71d3dac3498b02 Mon Sep 17 00:00:00 2001
From: Peter Hurley <peter@hurleysoftware.com>
Date: Wed, 30 Jan 2013 12:43:52 -0500
Subject: pty: Ignore slave open count for master pty open

Multiple slave pty opens may be performed in parallel with the
master open. Of course, all the slave opens will fail because the
master pty is still locked but during this time the slave pty
count will be artificially greater than 1. This is should not
cause the master pty open to fail.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index d38455f..c24b4db 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -256,7 +256,7 @@ static int pty_open(struct tty_struct *tty, struct file *filp)
 		goto out;
 	if (test_bit(TTY_PTY_LOCK, &tty->link->flags))
 		goto out;
-	if (tty->link->count != 1)
+	if (tty->driver->subtype == PTY_TYPE_SLAVE && tty->link->count != 1)
 		goto out;
 
 	clear_bit(TTY_IO_ERROR, &tty->flags);
-- 
cgit v0.10.2