keyspan: fix oops

[linux-2.6] / drivers / usb / serial / keyspan.c

diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index feba9679ace8b35103fc7ac0315adefdf97b855f..7c069a02c1dd40817d93b58dffed4217bd740ff2 100644 (file)
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -447,7 +447,7 @@ static void usa26_indat_callback(struct urb *urb)
 
        port = (struct usb_serial_port *) urb->context;
        tty = port->tty;
-       if (urb->actual_length) {
+       if (tty && urb->actual_length) {
                /* 0x80 bit is error flag */
                if ((data[0] & 0x80) == 0) {
                        /* no errors on individual bytes, only possible overrun err*/