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USB: iuu_phoenix: lock priv->tiostatus properly

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Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2008-02-20 21:39:25 +00:00 • committed by Greg Kroah-Hartman
parent e298449401
commit 7b1fc8bc6d
1 changed files with 13 additions and 5 deletions
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18
drivers/usb/serial/iuu_phoenix.c
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@ -148,20 +148,21 @@ static int iuu_tiocmset(struct usb_serial_port *port, struct file *file,
unsigned int set, unsigned int clear) unsigned int set, unsigned int clear)
{ {
struct iuu_private *priv = usb_get_serial_port_data(port); struct iuu_private *priv = usb_get_serial_port_data(port);
struct tty_struct *tty; unsigned long flags;
tty = port->tty;
/* FIXME: locking on tiomstatus */
dbg("%s (%d) msg : SET = 0x%04x, CLEAR = 0x%04x ", __FUNCTION__, dbg("%s (%d) msg : SET = 0x%04x, CLEAR = 0x%04x ", __FUNCTION__,
port->number, set, clear); port->number, set, clear);
spin_lock_irqsave(&priv->lock, flags);
if (set & TIOCM_RTS) if (set & TIOCM_RTS)
priv->tiostatus = TIOCM_RTS; priv->tiostatus = TIOCM_RTS;
if (!(set & TIOCM_RTS) && priv->tiostatus == TIOCM_RTS) { if (!(set & TIOCM_RTS) && priv->tiostatus == TIOCM_RTS) {
dbg("%s TIOCMSET RESET called !!!", __FUNCTION__); dbg("%s TIOCMSET RESET called !!!", __FUNCTION__);
priv->reset = 1; priv->reset = 1;
return 0;
} }
spin_unlock_irqrestore(&priv->lock, flags);
return 0; return 0;
} }
@ -173,7 +174,14 @@ static int iuu_tiocmset(struct usb_serial_port *port, struct file *file,
static int iuu_tiocmget(struct usb_serial_port *port, struct file *file) static int iuu_tiocmget(struct usb_serial_port *port, struct file *file)
{ {
struct iuu_private *priv = usb_get_serial_port_data(port); 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) static void iuu_rxcmd(struct urb *urb)