USB: mct_u232: add sanity checking in probe

[pandora-kernel.git] / drivers / usb / serial / mct_u232.c

diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 96a62dd..a7e7ba6 100644 (file)
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -443,6 +443,12 @@ static int mct_u232_startup(struct usb_serial *serial)
        struct mct_u232_private *priv;
        struct usb_serial_port *port, *rport;
 
+       /* check first to simplify error handling */
+       if (!serial->port[1] || !serial->port[1]->interrupt_in_urb) {
+               dev_err(&port->dev, "expected endpoint missing\n");
+               return -ENODEV;
+       }
+
        priv = kzalloc(sizeof(struct mct_u232_private), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;