[PATCH 2/2] Add kref to fake tty used by USB console

From: Alan Cox
Date: Mon Dec 01 2008 - 06:36:35 EST

From: Kevin Hao <kexin.hao@xxxxxxxxxxxxx>

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@xxxxxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>

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;

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