From 2ee44fbeac92c36e53779a57ee84cfee1affe418 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 25 Oct 2012 10:29:00 +0200 Subject: [PATCH] USB: metro-usb: fix io after disconnect Make sure no control urb is submitted during close after a disconnect by checking the disconnected flag. Cc: Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/metro-usb.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index 25cb97c25ad4..6f29c74eb769 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -179,16 +179,13 @@ static void metrousb_cleanup(struct usb_serial_port *port) { dev_dbg(&port->dev, "%s\n", __func__); - if (port->serial->dev) { - /* Shutdown any interrupt in urbs. */ - if (port->interrupt_in_urb) { - usb_unlink_urb(port->interrupt_in_urb); - usb_kill_urb(port->interrupt_in_urb); - } + usb_unlink_urb(port->interrupt_in_urb); + usb_kill_urb(port->interrupt_in_urb); - /* Send deactivate cmd to device */ + mutex_lock(&port->serial->disc_mutex); + if (!port->serial->disconnected) metrousb_send_unidirectional_cmd(UNI_CMD_CLOSE, port); - } + mutex_unlock(&port->serial->disc_mutex); } static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)