From alan@lxorguk.ukuu.org.uk Wed Feb 20 14:28:55 2008 From: Alan Cox Date: Wed, 20 Feb 2008 21:39:25 +0000 Subject: USB: iuu_phoenix: lock priv->tiostatus properly To: akpm@osdl.org, greg@kroah.com, linux-usb@vger.kernel.org Message-ID: <20080220213925.002facbd@core> Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/iuu_phoenix.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) --- a/drivers/usb/serial/iuu_phoenix.c +++ b/drivers/usb/serial/iuu_phoenix.c @@ -148,20 +148,21 @@ static int iuu_tiocmset(struct usb_seria unsigned int set, unsigned int clear) { struct iuu_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; - tty = port->tty; + unsigned long flags; + /* FIXME: locking on tiomstatus */ dbg("%s (%d) msg : SET = 0x%04x, CLEAR = 0x%04x ", __FUNCTION__, port->number, set, clear); + + spin_lock_irqsave(&priv->lock, flags); if (set & TIOCM_RTS) priv->tiostatus = TIOCM_RTS; if (!(set & TIOCM_RTS) && priv->tiostatus == TIOCM_RTS) { dbg("%s TIOCMSET RESET called !!!", __FUNCTION__); priv->reset = 1; - return 0; } - + spin_unlock_irqrestore(&priv->lock, flags); return 0; } @@ -173,7 +174,14 @@ static int iuu_tiocmset(struct usb_seria static int iuu_tiocmget(struct usb_serial_port *port, struct file *file) { struct iuu_private *priv = usb_get_serial_port_data(port); - return priv->tiostatus; + unsigned long flags; + int rc; + + spin_lock_irqsave(&priv->lock, flags); + rc = priv->tiostatus; + spin_unlock_irqrestore(&priv->lock, flags); + + return rc; } static void iuu_rxcmd(struct urb *urb)