1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 3368d2b0412d..a52115407ea1 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -677,6 +677,9 @@ static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
         unsigned long flags;
         u8 control;
 
+        if (!usb_get_intfdata(port->serial->interface))
+                return -ENODEV;
+
         spin_lock_irqsave (&priv->lock, flags);
         if (set & TIOCM_RTS)
                 priv->line_control |= CONTROL_RTS;
@@ -702,6 +705,9 @@ static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
 
         dbg("%s (%d)", __FUNCTION__, port->number);
 
+        if (!usb_get_intfdata(port->serial->interface))
+                return -ENODEV;
+
         spin_lock_irqsave (&priv->lock, flags);
         mcr = priv->line_control;
         status = priv->line_status;