linux-kernel - [PATCH 1/2] init tty kref in usb serial console setup

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Message-Id: <23d0e3c26b7580b20c76900e16a53e42950ffaab.1226366228.git.kexin.hao@windriver.com>
Date:	Thu, 13 Nov 2008 09:53:36 +0800
From:	Kevin Hao <kexin.hao@...driver.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	gregkh@...e.de, Alan Cox <alan@...hat.com>,
	linux-usb@...r.kernel.org
Subject: [PATCH 1/2] init tty kref in usb serial console setup

We alloc a fake tty in usb serial console setup function. we should
init the tty's kref otherwise we will face WARN_ON after following
invoke of tty_port_tty_set --> tty_kref_get.

Signed-off-by: Kevin Hao <kexin.hao@...driver.com>
---
 drivers/usb/serial/console.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index 5b20de1..5b95009 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -135,6 +135,7 @@ static int usb_console_setup(struct console *co, char *options)
 				err("no more memory");
 				goto reset_open_count;
 			}
+			kref_init(&tty->kref);
 			termios = kzalloc(sizeof(*termios), GFP_KERNEL);
 			if (!termios) {
 				retval = -ENOMEM;
-- 
1.6.0.3.640.g6331a

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